Authors: B. Singh, J. K. Tuli, E. Browne |  Citation: Nucl. Data Sheets 170, 499 (2020) |  Cutoff date: 8-Oct-2020 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=3026 keV 16S(n)= 4234 keV 13S(p)= 9028 keV 16Q(α)= 2547 keV 16
Reference: 2017WA10

General Comments:

1990Me13, 1992Bo44: U(p,X),E=1 GeV, measured γ radiation, half-life by γ decay curve; deduced delayed-fission probability

2018Ly01: radioactive beams of radium isotopes (α=222-233) produced by impinging 1.4-GeV protons onto a thick uranium carbide (UCx) target at the ISOLDE-CERN facility. Radium atoms diffusing out of the target were ionized by a combination of surface ionization and multistep laser resonance ionization, using the resonance ionization laser ion source (RILIS), then accelerated to 30 keV and mass separated using the high resolution separator (HRS). Finally, the ions were cooled and bunched using the ISOLDE linear Paul trap ISOLDE cooler (ISCOOL), re-accelerated to 30 keV and directed to the Collinear Resonance Ionization Spectroscopy (CRIS) beam line. Measured low-resolution hyperfine-structure spectra of the 7s21S{+0|)7s7p3P1 atomic transition in 233Ra, change in rms charge radii, and isotope shifts

2014Kr09: mass measurement by tof-ICR resonances, and frequency ratios

2012Ch19 (also 2008ChZI thesis): mass measurement by Schottky Mass Spectrometry technique

Theoretical studies: consult the NSR database at for four references dealing with theoretical calculations about structure or decay half-lives

Q-value: S(2n)=10025 14, S(2p)=16700 300 (syst) (2017Wa10)

Jπ(level) T1/2(level)
  0 (1/2+) 30 s 5 
% β- = 100

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Additional Level Data and Comments:

  0(1/2+) 30 s 5 
% β- = 100
Measured isotope shifts: δν(214Ra,233Ra)=-62300 MHz 500; δν(226Ra,233Ra)=-20600 MHz 500 (2018Ly01).

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