This Section details the classes and functions on which the Programming section is built

1. ndlab module¶

This is the user entry point to interrogate the database and to write custom software. It provides:

Functions to retrieve data
Functions to handle SQL
Classes to handle values and uncertainites
Classes modelling nuclear structure
Functions to create them
Static classes to build the fields and filter parameters

This page documents the main functions the user should call, for full documentation see the source code

Querying the database¶

Functions to retrieve data¶

These take two parameters , see 1. Retrieval functions. Some of them are specific for feeding data into a pandas dataframe

ndlab.csv_data(fields, filter)[source]¶

CSV data from a query

Parameters:

fields (str) – list of comma-separated ndlaborm fields
filter (str) – filter condition built with ndlaborm fields

Returns:

CSV structure with the data

Return type:

str

fields = "NUCLIDE.Z, NUCLIDE.ATOMIC_MASS"
filter = "NUCLIDE.NUC_ID = '135XE'"

csv = nl.csv_data(fields, filter)

print(csv)

>>z,atomic_mass
>>54,134907231.441

ndlab.json_data(fields, filter)[source]¶

JSON data from a query

Parameters:

fields (str) – list of comma-separated ndlaborm fields
filter (str) – filter condition built with ndlaborm fields

Returns:

JSON structure with the result set

Return type:

str

fields = "NUCLIDE.Z, NUCLIDE.ATOMIC_MASS"
filter = "NUCLIDE.NUC_ID = '135XE'"

json = nl.json_data(fields, filter)
print(json)

>>[ {'z':'54'  ,'atomic_mass':'134907231.441'}]

ndlab.pandas_df(fields, filter, pandas)[source]¶

Creates a dataframe

If the database is local, calls pandas’ read_sql method using query_build to build the query, and query_con to get the db connection

If the database is remote, calls the server API

Parameters:

fields (str) – list of comma-separated ndlaborm fields
filter (str) – filter condition built with ndlaborm fields
pandas (Object) – the pandas module imported in the calling environment. E.g. pass when pd when using import pandas as pd

Returns:

the pandas dataframe

Return type:

Dataframe

import pandas as pd

fields = "NUCLIDE.Z, NUCLIDE.ATOMIC_MASS"
filter = "NUCLIDE.NUC_ID = '135XE'"

df = nl.pandas_df(fields, filter, pd)
print(df)

>>    z   atomic_mass
>>0  54  1.349072e+08

ndlab.pandas_df_nl(list, pandas)[source]¶

Returns a Dataframe from a list of ndlab.Ndm_base classes

Parameters:: list (List) – list of ndlab class instances pandas (Object): the pandas module imported in the calling environment. E.g. pass when pd when using import pandas as pd
Returns:: the pandas dataframe
Return type:: Dataframe

import pandas as pd

nuc = nl.nuclide("135XE")
levels = nuc.levels()

df = nl.pandas_df_nl(levels, pd)

df

    z       n       nucid   l_seqno energy  energy_unc      half_life       half_life_unc   half_life_units half_life_sec   ...     jp_order        jp_method       jp_str  quadrupole_em   quadrupole_em_unc       dipole_mm       dipole_mm_unc   questionable    configuration   isospin
0   54      81      135XE   0       0.000   0.000000        9.14    0.02    h       32904.0 ...     1       0       3/2+    0.214   0.007   0.9032  0.0007  NaN     NaN     NaN
1   54      81      135XE   1       288.455 0.000015        0.00    0.00    NaN     0.0     ...     1       0       1/2+    0.000   0.000   0.0000  0.0000  NaN     NaN     NaN
2   54      81      135XE   2       526.551 0.000013        15.29   0.05    m

ndlab.csv_nl(nl_items)[source]¶

CSV from a list of ndlab.Ndm_base classes

for each instance, calls its csv() method and composes the overall result

Parameters:: nl_items (Object[]) – list with ndlab class instances
Returns:: the CSV
Return type:: String

nuc = nl.nuclide("135XE")
levels = nuc.levels()

print(nl.csv_ndm(levels))

z,n,nucid,l_seqno,energy,energy_unc,half_life,half_life_unc,half_life_units,half_life_sec,half_life_sec_unc,j,parity,jp_order,jp_method,jp_str,quadrupole_em,quadrupole_em_unc,dipole_mm,dipole_mm_unc,questionable,configuration,isospin
54,81,135XE,0,0.0,0,9.14,0.02,h,32904.0,72.0,1.5,0,1,0,3/2+,0.214,0.007,0.9032,0.0007,,,
54,81,135XE,1,288.455,1.5e-05,0,0,,0,0,0.5,0,1,0,1/2+,0,0,0,0,,,
54,81,135XE,2,526.551,1.3e-05,15.29,0.05,m,917.4,3.0,5.5,1,1,0,11/2-,0,0,0,0,,,

ndlab.pandas_csv_nl(nl_items)[source]¶

Text stream with CSV from a list of ndlab.Ndm_base classes

Ready to be plugged into pandas. For each instance, calls its csv() method and composes the overall result

Parameters:: nl_items (Object[]) – list with ndlab class instances
Returns:: text stream with the CSV
Return type:: StringIO

nuc = nl.nuclide("135XE")
levels = nuc.levels()

stream = nl.pandas_csv_nl(levels)

stream

<_io.StringIO at 0x7f7e20420d30>

Functions to handle SQL¶

ndlab.query_build(fields, filter='')[source]¶

The SQL query associated with fields and filter

Parameters:

fields (str) – list of comma-separated ndlaborm fields
filter (str) – filter condition built with ndlaborm fields

Returns:

the SQL

Return type:

String

fields = " GAMMA.ENERGY "
filter = "GAMMA.NUC.Z = 4 and GAMMA.START_LEVEL.ENERGY > 700"

sql = nl.query_build(fields, filter)
sql

'select gammas.energy from gammas,nuclides as gam_nuc,levels as gam_lev_s where gammas.nucid=gam_nuc.nucid and gammas.nucid = gam_lev_s.nucid and gammas.l_seqno = gam_lev_s.l_seqno and gam_nuc.z = 4 and gam_lev_s.energy > 700'

ndlab.query_con()[source]¶

The connection to the database

Returns:: The connection to the database
Return type:: Connection

pd.read_sql(" select * from nuclides ", nl.query_con())

Managing Values and Uncertainities¶

Implementing the ISO Vocabulary, these classes are used as instance variables, see below

class ndlab.Property(name='')[source]¶

Models the ISO VIM

Upper class with only the name of the property

class ndlab.Nominal(name='')[source]¶

Models the ISO VIM

Quantities without magnitude

class ndlab.Quantity(name='')[source]¶

Models the ISO VIM and handles the uncertainties propagation with ufloat from the uncertainties package

sep¶

The CSV separator to be used when dumping to CSV

Type:: string

Variables:

nominal (string) – name
value (float) – float value
unc (string) – uncertainity as string
unc_num (float) – uncertainity as float
Operator – Operator

create(unc, operator='=')[source]¶

Creates a Quantity from a value, and uncertainty, and an operator.

Used internally from overloaded mathematical functions

Parameters:

value (float) – value
unc (float) – uncertainty
operator (Operator) – operator

csv()[source]¶

Generates the CSV representation of the quantity

Returns: String: the CSV

ufloat()[source]¶: ufloat of the `uncertainties <https://pythonhosted.org/uncertainties/`__ package from value and uncertainty

class ndlab.Operator[source]¶

Qualifier of a value, e.g. >

Contains the allowed modifiers and the rules of composition to handle matemathical operations between quantities

compose(ob)[source]¶

Rule for operators composition

Parameters:

oa (Operator) – operator of the first quantity
ob (Operator) – operator of the second quantity

Returns:

oa composed with ob

Return type:

Operator

class ndlab.Unit[source]¶: Units of measure

Functions creating data model classes¶

The following functions directly populate the classes representing the nuclear data model.
They accept the optional filter parameter to apply conditions to the selection
For example, the ndlab.levels() will populate  instances of ndlab.Level.

A ndlab.Level can also be indirectly created from an instance of ndlab.Nuclide by accessing its ndlab.Nuclide.levels() method

ndlab.nuclide(nucid)[source]¶

A ndlab.Nuclide from its identifyer

Parameters:: nucid (str) – mass+element symbol, e.g.135XE
Returns:: the NUCLIDE with this id
Return type:: Nuclide

ndlab.nuclides(filter='')[source]¶

A list of ndlab.Nuclide

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the NUCLIDE entity
Return type:: Nuclide

ndlab.levels(filter='')[source]¶

A list of ndlab.Level

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the LEVEL entity
Return type:: Level

ndlab.gammas(filter='')[source]¶

A list of ndlab.Gamma

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the GAMMA entity
Return type:: Gamma

ndlab.l_decays(filter='')[source]¶

A list of ndlab.L_decays

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the L_DECAY entity
Return type:: L_decay

ndlab.dr_gammas(filter='')[source]¶

A list of ndlab.Dr_gamma

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_gamma

ndlab.dr_alphas(filter='')[source]¶

A list of ndlab.Dr_alpha

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_ALPHA entity
Return type:: Dr_alpha

ndlab.dr_beta_ms(filter='')[source]¶

A list of ndlab.Dr_betam

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_betam

ndlab.dr_anti_nus(filter='')[source]¶

A list of ndlab.Dr_anti_nu

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_anti_nu

ndlab.dr_beta_ps(filter='')[source]¶

A list of ndlab.Dr_betap

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_betap

ndlab.dr_nus(filter='')[source]¶

A list of ndlab.Dr_nu

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_nu

ndlab.dr_xs(filter='')[source]¶

A list of ndlab.Dr_x

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_x

ndlab.dr_convels(filter='')[source]¶

A list of ndlab.Dr_conv_el

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_conv_el

ndlab.dr_augers(filter='')[source]¶

A list of ndlab.Dr_Augher

Shells included are K and L

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Dr_Auger

ndlab.cum_fys(filter='')[source]¶

A list of ndlab.Cum_fy

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Cum_fy

ndlab.ind_fys(filter='')[source]¶

A list of ndlab.Ind_fy

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Return type:: Ind_fy

ndlab.check_filter(filter, function)[source]¶

Whether a filter is okay when applied to a given function

Filter should query only one table (besides embedded foreign keys)

Parameters:

filter (str) – the filter
function (Function) – the ndlab function accepting the filter

Return type:

Boolean

Data model classes¶

ndlab.Nuclide¶

class ndlab.Nuclide[source]¶

The properties of given Z and N pair

Note that properties like Half-life, etc are to be accessed through its ground state (gs)

Variables:

z (int) – number of protons
n (int) – number of neutrons
nucid (str) – nuclide id mass + element symbol 135XE
charge_radius (Quantity) – charge radius
atomic_mass (Quantity) – atomic mass
mass_excess (Quantity) – mass excess
binding_en (Quantity) – binding en
beta_decay_en (Quantity) – beta decay energy
s2n (Quantity) – 2-neutron separation energy
s2p (Quantity) – 2-protons separation energy
qa (Quantity) – Q-value for alpha decay
abundance (Quantity) – natural abundance in mole fraction
gs (Level) – ground state
daughters (Nuclide[]) – direct daughters of the nuclide, including excited states decays
parents (Nuclide[]) – parents of the nuclide
daughters_chain (Nuclide[]) – all possible offsprings of the nuclide
parents_chain (Nuclide[]) – all possible ancestors of the nuclide
decays (Decay[]) – all decays, including fron metastable states, for which decay radiations are given

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

gammas(filter='NO_PARAM')[source]¶

Gamma transitions between levels of this nuclide

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the NUCLIDE entity
Returns:: the list of ndlab.Gamma of this nuclide

levels(filter='NO_PARAM')[source]¶

Energy levels of this nuclide

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the NUCLIDE entity
Returns:: the list of ndlab.Level of this nuclide

ndlab.Level¶

class ndlab.Level[source]¶

Properties of an energy eigenstate of a Nuclide

z, n, and nucid are for convenience. The can be accessed also through the ‘nuclide’ property

Variables:

z (int) – number of protons of the nuclide
n (int) – number of neutron of the nuclide
nucid (string) – nuclide’s indentifier, e.g. 135XE
l_seqno (int) – sequential number or the level, 0 being the g.s.
energy (Quantity) – energy in keV
half_life (Quantity) – H-l in the units given by the evaluation
half_life_units (string) – units given by the evaluation
half_life_sec (Quantity) – H-l given in seconds
jp_str (string) – Jp given in the evaluation
jp_order (int) – occurrence of this Jp value, 0 being the one closest to the g.s.
j (float) – Angular momentum assignment given by RIPL
parity (int) – parity assignment given by RIPL
jp_method (string) – method of jp assignment by RIPL
quadrupole_em (Quantity) – Quadrupole electric moment in barn
dipole_mm (Quantity) – Dipole magnetic moment in nuclear magnetons
questionable (string) – whether the existence is questionable
configuration (string) – nuclear configuration
isospin (string) – isospin
nuclide (Nuclide) – access to the nuclide
daughters (Nuclide[]) – the direct daughters of the level decay, if any

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

decays(filter='NO_PARAM')[source]¶

Decay modes of this level

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the NUCLIDE entity
Returns:: the list of ndlab.L_decays of this level

gammas(filter='NO_PARAM')[source]¶

Gamma transitions starting from this level

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the LEVEL entity
Returns:: the list of ndlab.Gamma starting from this level

ndlab.Gamma¶

class ndlab.Gamma[source]¶

Electromagnetic transition between levels of the same nuclide

z, n, and nucid can be accessed also through the ‘nuclide’ property. l_seqno can be accessed though the ‘level’ property

Variables:

z (int) – number of protons of the nuclide
n (int) – number of neutron of the nuclide
nucid (string) – nuclide’s indentifier, e.g. 135XE
l_seqno (int) – sequential number of the start level, 0 being the g.s.
g_seqno (int) – sequential number of this gamma within the start level gammas, 0 being the lowest energy one
nuclide (Nuclide) – the nuclide
start_level (Level) – the start level
end_level (Level) – the start level
energy (Quantity) – energy [keV]
rel_photon_intens (Quantity) – relative photon intensity %
multipolarity (string) – multipolarity
mixing_ratio (Quantity) – mixing ratio
tot_conv_coeff (Quantity) – total conversion coefficient
bew (Quantity) – reduced electric transition probabilities in Weisskopf units
bew_order (Quantity) – bew order
bmw (Quantity) – reduced magnetic transition probabilities in Weisskopf units
bmw_order (Quantity) – bmx order
questionable (string) – whether the existence is questionable

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.L_decay¶

class ndlab.L_decay[source]¶

Decay process

Description of a level decay: parent, daughter, radiations, etc… nucid , l_seqno, and daughter_nucid are for convenience. The can be accessed also through the ‘nuclide’, ‘daughter’, and ‘level’ properties, respectively

Variables:

nucid (string) – decaying nuclide indentifier, e.g. 135XE
l_seqno (int) – sequential number or the decaying level, 0 being the g.s.
daughter_nucid (string) – daughter nuclide indentifier, e.g. 135XE
perc (Quantity) – decays per 100 decay of the parent
nuclide (Nuclide) – the parent nuclide
level (Level) – the parent level
daughters (Nuclide[]) – the direct daughters of the decay
nuclide – the parent nuclide
mode (Decay_mode) – the decay mode
toten_recoil (Quantity) – total recoil energy [keV]
q_togs (Quantity) – Q-value [keV]

alphas(filter='NO_PARAM')[source]¶

Alpha radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_ALPHA entity
Returns:: the list of ndlab.Dr_alpha from this decay

annihil(filter='NO_PARAM')[source]¶

Annihilation radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_ANNIHIL entity
Returns:: the list of ndlab.Dr_annihil from this decay

anti_nus(filter='NO_PARAM')[source]¶

Anti neutrino radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_ANTI_NU entity
Returns:: the list of ndlab.Dr_anti_nu from this decay

augers(filter='NO_PARAM')[source]¶

Auger electrons from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_AUGER entity
Returns:: the list of ndlab.Dr_auger from this decay

betas_m(filter='NO_PARAM')[source]¶

Beta- radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_BETAM entity
Returns:: the list of ndlab.Dr_betam from this decay

betas_p(filter='NO_PARAM')[source]¶

Beta+ radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_BETAP entity
Returns:: the list of ndlab.Dr_betap from this decay

convels(filter='NO_PARAM')[source]¶

Conversion electrons from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_CONV_EL entity
Returns:: the list of ndlab.dr_conv_el from this decay

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

dr_photon_tot(filter='NO_PARAM')[source]¶

Photons emitted in the decay process, if any, regardless of the daughter or the radiation type (X- or Gamma- ray)

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_PHOTON_TOTAL entity
Returns:: the list of ndlab.Dr_photon_tot from this decay

gammas(filter='NO_PARAM')[source]¶

Gamma radiation from this decay

The radiation is emitted by the daughter

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_GAMMA entity
Returns:: the list of ndlab.Dr_gamma from this decay

nus(filter='NO_PARAM')[source]¶

Neutrino radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_NU entity
Returns:: the list of ndlab.Dr_Nu from this decay

tot_measured_en()[source]¶

Total energy emitted per 100 decays of the parent

calculated as sum (energy * intensity / 100 ) over all radiations

Returns:: the total energy
Return type:: Quantity

tot_rad_en(radiations)[source]¶

Energy emitted by a set of radiations

calculated as energy * intensity / 100

Parameters:: radiations (Decay_radiation) – list of any decay radiations
Returns:: the energy
Return type:: Quantity

xs(filter='NO_PARAM')[source]¶

X-rays radiation from this decay

Parameters:: filter (str) – filter passed to the function by the user. It may contain only fields of the DR_X entity
Returns:: the list of ndlab.Dr_x from this decay

ndlab.Cum_fy¶

class ndlab.Cum_fy[source]¶

Cumulative fission yield

Variables:

parent (Nuclide) – the fissioning nuclide
daughter (Nuclide) – the product nuclide
thermal (Quantity) – thermal neutron fission yield
fast (Quantity) – fast neutron fission yield
mev_14 (Quantity) – 14 MeV neutron fission yield

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Ind_fy¶

class ndlab.Ind_fy[source]¶

Independent fission yield

Variables:

parent (Nuclide) – the fissioning nuclide
daughter (Nuclide) – the product nuclide
thermal (Quantity) – thermal neutron fission yield
fast (Quantity) – fast neutron fission yield
mev_14 (Quantity) – 14 MeV neutron fission yield

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Decay_radiation¶

class ndlab.Decay_radiation[source]¶

Base class for decay radiations

Its Attributes are inherited by all the Dr_* classes describing each type of radiation

parent_nucid , parent_l_seqno, daughter_nucid, and daughter_l_seqno are for convenience. The can be accessed also through the ‘nuclide’, ‘daughter’, and ‘level’ properties, respectively

Variables:

parent (Nuclide) – the parent nuclide
daughter (Nuclide) – the daughter nuclide
parent_level (Level) – the parent level
fed_level (Level) – the daughter level populated by the decay
decay (L_decay) – access to the level decay, with all the other radiations emitted
energy (Quantity) – energy [keV]
intensity (Quantity) – for 100 decays of the parent
parent_nucid (string) – parent nuclide indentifier, e.g. 135XE
parent_l_seqno (int) – sequential number or the parent level, 0 being the g.s.
daughter_nucid (string) – daughter nuclide indentifier, e.g. 135XE
daughter_l_seqno (int) – sequential number or the daughter level populated, 0 being the g.s.
decay_code (int) – code of the decay, see the DECAY_* constants in ndlaborm

ndlab.Dr_gamma¶

class ndlab.Dr_gamma[source]¶

Gamma decay radiation

Inherits all the attributes of Gamma

Variables:

parent (Nuclide) – the parent nuclide
parent_level (Level) – the parent level
decay (L_decay) – access to the level decay, with all the other radiations emitted
intensity (Quantity) – for 100 decays of the parent
parent_nucid (string) – parent nuclide indentifier, e.g. 135XE
parent_l_seqno (int) – sequential number or the parent level, 0 being the g.s.
decay_code (int) – code of the decay, see the DECAY_* constants in ndlaborm

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_alpha¶

class ndlab.Dr_alpha[source]¶

Alpha decay radiation

Inherits all the attributes of Decay_radiation

Variables:: hindrance (Quantity) – hindrance factor

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_betam¶

class ndlab.Dr_betam[source]¶

Beta- decay radiation

Inherits all the attributes of Decay_radiation Contains the energy of the associated anti-neutrino

Variables:

logft (Quantity) – Log ft
endpoint (Quantity) – end point energy [keV]
trans_type (String) – transition type
anti_nu_energy (Quantity) – energy ino

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_betap¶

class ndlab.Dr_betap[source]¶

Beta+/Electron Capture decay radiation

Inherits all the attributes of Dr_betam Contains the energy of the associated neutrino

Variables:

ec_energy (Quantity) – electron capture energy
intensity (Quantity) – beta+ intensity
ec_intensity (Quantity) – electron capture intensity
bpec_intensity (Quantity) – beta+ + electron capture intensity

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_anti_nu¶

class ndlab.Dr_anti_nu[source]¶

Anti neutrino decay radiation

Inherits all the attributes of Decay_radiation Contains the energy of the associated electron

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_nu¶

class ndlab.Dr_nu[source]¶

Neutrino decay radiation

Inherits all the attributes of Decay_radiation The fields energy, intensity, log_ft, trans_type, endpoint, bp_energy refer to the emission via beta+ process The fields intensity_ec, energy_ec refer to the emission via electron capture

Variables:

intensity (Quantity) – intensity for emission via beta+ process
energy (Quantity) – mean energy for emission via beta+ capture process
intensity_ec (Quantity) – intensity for emission via electron capture process
energy_ec (Quantity) – mean energy for emission via electron capture process
logft (Quantity) – Log ft for the beta+ decay
endpoint (Quantity) – end point energy [keV] the beta+ decay
trans_type (String) – transition type

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

ndlab.Dr_delayed¶

class ndlab.Dr_delayed[source]¶

Delayed particle emission

Inherits all the attributes of Decay_radiation

Variables:

energy_x (Quantity) – energy of the intermediate state
particle (string) – delayed particle

csv()¶

Generates a String with the CSV representation for an instance of class

the attribute _cst_title stores the first row of the csv with the field names

Returns:: the csv
Return type:: string

2. ndlaborm module¶

The static classes in this module are described in here. They are the building blocks of the fields and filter parameters of the data-retrieval functions.

For example to refer to the level-energy, use LEVEL.ENERGY

You can access the code and its comments here

3. ndlabdblink module¶

Talks with the database and retrieves the data. You can access the code and its comments