Nucléide-Lara - Quick user's guide

Library for gamma and alpha emissions

 Simple use (consultation): (Cf. Fig.1)
 (Allows you to display information on a particular nuclide)

  1. Select one (or multiple) nuclide(s) in the 'Nuclide list' or type the name or mass or symbol (e.g. 152Eu or Eu-152 or 152 or Eu) in the 'Nuclide, element or mass number search' text area;
  2. Optionally:
    - Set energy and/or intensity thresholds to display only the emissions above the specified threshold(s);
    - Set γ-γ coincidence threshold (product of intensities of two coincident γ emissions) to only display intense coincidences;
    - Choose to display coincidences;
    - Set display order (by increasing energy or decreasing intensity);
    - Choose to display decay tools (decay calculation and mass to activity conversion);
    - Choose to display data, emissions and/or decay scheme;
    - Set emission type: X, gamma and/or alpha;
  3. - Choose display language (applied to all frames after restart or by pressing );
  4. Press (or 'Enter') to display the results in the right part of the screen, or to display a magnified decay scheme in a separate window.
  5. The uncertainty, when defined, is displayed in parentheses.
    It refers to the corresponding last digits, i.e.:
    9.230 (11) means 9.230 ± 0.011 and
    9.2 (11) means 9.2 ± 1.1
  6. For each nuclide, daughters and possible parents are indicated and, if present in the database, a link to their information is displayed.
    It is thus possible to easily navigate through the nuclides constituting a radioactive decay chain.
  7. Links to evaluation files are also provided, when available.

 Advanced use (search): (Cf. Fig.2)
 (Allows you to find nuclides meeting multiple search criteria)

  1. Select one or more of the following:
    - Set decay mode(s): beta+, electron capture (β+,ε), beta- (β-), isomeric transition (IT) and/or alpha (α) and their combination mode: And, Or or XOr (exclusive OR);
    - Set emission type: X, gamma and/or alpha;
    - Set energy ranges (up to 3 energies) and their combination mode: And or Or;
    - Set intensity range;
    - Set atomic mass range;
    - Set half-life range;
  2. Press to display the nuclides meeting the search criteria in the middle part of the screen;
  3. Then select the nuclide you want in one of the 'Nuclide lists' (sorted by increasing energy, by decreasing intensity or by mass number) to display the result in the right part of the screen.
  4. Press (or 'Enter') to display the results in the right part of the screen, or to display a magnified decay scheme with highlighted emissions in a separate window (Cf. Fig.3).

 Remarks:

  1. For energy search criteria:
    - Set energy and step (E ± ΔE) or energy range (Emin - Emax).
    - To search for a specific energy, set energy step to zero (E ± 0).
    - If only lower limit is set, query will return all nuclides with energies greater than this limit.
    - If only upper limit is set, query will return all nuclides with energies lower than this limit.
  2. For other search criteria:
    - If only lower limit is set, query will return all nuclides whose criterion value is greater than this limit.
    - If only upper limit is set, query will return all nuclides whose criterion value is lower than this limit.
    - If lower limit is greater than upper limit, they will automatically be switched in the query.
  3. You can select more than one nuclide in the following nuclide lists: 'Nuclide list:' in the left frame and 'Nuclide (half-life):' in the middle frame: maintain CTRL key pressed and click to select multiple nuclides (Cf. Fig.1 & 2).
  4. When searching nuclides by energy and/or intensity, emissions meeting the search criteria are highlighted in yellow.
    Other significant emissions are highlighted in blue (intensities of same order of magnitude, or higher).
    These emissions are also highlighted in the decay scheme, with one colour per energy range (Cf. Fig.3).
  5. When searching by decay mode:
    - If only one decay mode is selected (when in mode And or Or), all nuclides containing at least this decay mode will be displayed.
    - If XOr is used, all nuclides containing only one of the specified decay modes will be displayed.
  6. When searching by energy range:
    - If And mode is used, only nuclides containing all the specified energies will be displayed.
    - If Or mode is used, all nuclides containing at least one of the specified energies will be displayed.
      Nevertheless, nuclides containing all the specified energies are highlighted with an asterisk in the resulting nuclide list.

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Fig.1: Simple use (consultation)

Fig.2: Advanced use (search)

Fig.3: Decay scheme with highlighted emissions

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