ADOPTED LEVELS for 233Ra
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 16 | S(n)= 4234 keV 13 | S(p)= 9028 keV 16 | Q(α)= 2547 keV 16 | ||
| Reference: 2017WA10 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | (1/2+) | 30 s 5 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | 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). |
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 www.nndc.bnl.gov 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)