Live Chart of Nuclides help page send a feedback

Quick reference

	Arrow buttons shift the observer along the pointed direction.
	Plus and minus buttons allow zooming in and out.
	Reset button brings the LiveChart to the default status.
Drag	Keep the mouse left button clicked on any point of the screen and drag in the desired direction to move the LiveChart.
Mouse over	Roll the mouse over a nuclide to show the data panel .
Click	Click on a nuclide to fix the data panle position. Click again on any point to restart the rolling mode.
Double click	Double click on a nuclide to show a popup page with detailed data.
	Makes visible the filter panel. See below its content.
	Shows the table of elements .
	Click on one element in the elements table to zoom the Live Chart on its isotopes .
	Inverts the status of each checkbox.
	Shows a popup page with the details of up to 200 selected nuclides.

Live Chart Data Display

Roll the mouse over the LiveChart to show a panel with the underlying nuclide data.
in red are highlighted the nuclide and its chain of daughters, in white the chain of parents.
Click on a nuclide to stop the rolling mode. Click a second time on any point to restore the rolling mode.
Double click on a nuclide to show a popup page with detailed data comprising its levels.

Filter Panel

This panel allows you to apply selection criteria. That makes visible only the filtered nuclides. The number of visible nuclides is shown in the Filtered nuclides label besides the Filter panel button.
The purpose is to show or discover pattern in nuclides' data. Simple filtering can be a didactical tool: it shows how the nuclides far from the stability line disappear when the half life lower limit is increased, or how β+ and β- decayers are symmetrical with respect the stability line, or the relation between the even-even nuclides and Jp. But more complex patterns can be shown, like the different behaviour of β+ and β- decayers when the level energy bar is activated.

Ground state properties
Mendeleev table	Click on one element to filter all its isotopes. Click again to remove the filtering.
Decay modes	Filters for the ground state decay modes. The invert button inverts the status of each check. For example to filter only the nuclides having the ground state decaying α, first uncheck the α mode, then press invert.
Spin and Parity	Filters for the ground state spin and parity. Use the invert button as explained above.
Half Life	Drag the left or the right cursor to select a range for the ground state half-lives of nuclides.
Level and Gamma properties
Level energy	Filters all the nuclides having at least one level in the selected energy range.
Gamma energy	Filters all the nuclides having at least one gamma in the selected energy range.

Stable nuclides will be visible unless you exclude them by using the Half life bar.

Detailed HTML Data Display

Click on Download data from NDS server to show a data table with the filtered nuclides. No more than 200 nuclides can be shown (your browser might ask you to accept popups from www-nds.iaea.org). Click on a nuclide symbol to show its levels.

Sources of data

1 - ENSDF datasets, as maintained by the International Network of Nuclear Structure and Decay Data Evaluators and the US National Nuclear Data Center, Brookhaven National Laboratory. Snapshot of March 2008.
2 - Jagdish K. Tuli, Nuclear Wallet Cards, 7th edition, April 2005, Brookhaven National Laboratory, US National Nuclear Data Center.
3 - S. F. Mughabghab, Atlas of Neutron Resonances, Elsevier, 2006.

The LiveChart contains all nuclides present within both ENSDF and NWC.

Uncertainties

Uncertainties are shown in italics, and are expressed in terms of the last digit(s) of the recommended value. For example: 686.080 6 means 686.080 ± 0.006, 0.037 3 means 0.037 ± 0.003, and 1.97 +131 -19 means 1.97 +1.31 and -0.19.

Table

Column 1: Nuclide
Nuclide names are of the form Z, Element name, and A(m_i) where m_i denotes an isomeric state.
Nuclides are listed in order of:
1 - increasing atomic number Z,
2 - increasing mass number A,
3 - mass excess Δ (see column 3).

Some nuclides have ill-defined Δ and possess the same values for Z, A and Δ, which prevents any distinction being made between ground and metastable state(s) on the basis of the energies of these levels. Under these circumstances, ground or metastable states cannot be distinguished and these states remain unassigned within the data file (for example, 81-Tl-190 is ill-defined as either J^π = 2(-) or 7(+); and 83-Bi-194m is ill-defined as either J^π = (10-) or J^π = (6+, 7+)).

Column 2: J^πSpin and parity assignments without and with parentheses are based on strong and weak arguments, respectively. See the introductory pages of any issue of Nuclear Data Sheets for descriptions of strong and weak arguments for J^π assignments.

Column 3: Mass excess
Mass excesses are given in MeV, with ¹²C mass excess equal to zero by definition. Values for isomers are obtained by adding the excitation energy to the ground state mass excess. Whenever the excitation energy is not known, the mass excess for the next lower isomer is given. An appended “syst” denotes that the value is obtained from systematics.

Column 4: Natural abundance or half-life
Abundances are in bold font. An appended “syst” is present when a limit or an approximate value is obtained from systematics.
The adopted half-life units are as follows:

y	year
d	day
min	minute
s	second
ms	10^-3 second
μs	10^-6 second
ns	10^-9 second
ps	10^-12 second

Column 5: Decay modes
Decay modes are listed in order of decreasing strength, followed by the percentage branching. An expected but not observed mode of decay is followed by “?”.
Explanation of symbols:

β^-	β^- decay.
ε	ε (electron capture), and/or ε + β⁺, and/or β⁺.
IT	isomeric transition.
n	neutron decay.
p	proton decay.
α	alpha decay.
SF	spontaneous fission.
2β^-, 3α, …	double β^-, decay by means of three α emission, ...
β^-n, β^-p, …	delayed n, p, … emission following β^- decay.
εn, εp, …	delayed n, p, … emission following ε decay.

Column 6: Major Radiations
The quoted beta radiation energy is the end-point energy obtained by processing ENSDF datasets with RADLIST.
Selection criteria for the principal radiations:

Beta radiation:	most energetic branch with an intensity greater than 0.5% is listed first, followed in order of decreasing energy by a maximum of two other branches with intensities greater than 20%.
Alpha radiation:	four most intense branches with intensities greater than 0.5% are listed in order of energy.
Gamma radiation:	two most intense branches with intensities greater than 0.5% are listed in order of intensity.

Column 7 : Thermal Neutron Cross-section
Data are expressed in barns, and are taken from the Atlas of Neutron Resonances.
Notation:

σ_γ	neutron radiative capture measured in a Maxwellian flux.
σ_γ^m , σ_γ^{m + g}	neutron radiative capture measured with reactor neutrons, leading to the formation of ground (g) and metastable (m) states.
σ_f	neutron fission cross section.
σ_p	neutron cross section for proton emission.
σ_a	neutron absorption cross section.
σ_t	neutron total cross section.

Send a Feedback

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Now under development:
Option to change the color code linking it to each filter criteria.
Addition of new filter criteria: Q-values, Magnetic and Electric Moments, Mixing Ratios.