ADOPTED LEVELS for 73Co
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 158, 1 (2019) | Cutoff date: 16-May-2019
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=12690 keV SY | S(n)= 5290 keV SY | S(p)= 16280 keV SY | Q(α)= -15070 keV SY | ||
Reference: 2017WA10 |
E(level) (keV) | T1/2(level) |
0 | 40.7 ms 13 % β- = 100 % β-2n = ? % β-n < 22 8 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | 40.7 ms 13 % β- = 100 % β-2n = ? % β-n < 22 8 | Theoretical T1/2=19.0 ms, %β-n=9, %β-2n=0 (2019Mo01). E(level): Theoretical T1/2=19.0 ms, %β-n=9, %β-2n=0 (2019Mo01). |
1995En07, 1997Be70: 73Co identified in 9Be(238U,F) E=750 MeV/nucleon reaction; measured production cross section, residuals fission yields. Fully-stripped fission product separation, magnetic rigidity, trajectory, energy deposit, tof method
2010Ho12: 9Be(86Kr,X) E=140 MeV/nucleon; fully-ionized 86Kr beam, A1900 fragment separator at NSCL facility using Bρ-ΔE-Bρ method. After separation, the mixed beam was implanted into the NSCL β-counting system (BCS) consisting of stacks of Si PIN detectors, a double-sided Si strip detector (DSSD) for implantation of ions, and six single-sided Si strip detectors (SSSD) followed by two Si PIN diodes. The identification of each implanted event was made from energy loss, time-of-flight information and magnetic rigidity. The implantation detector measured time and position of ion implantations and β decays. Neutrons were detected with NERO detector. Measured β- and βn-correlated events with ion implants; half-life of 73Co and delayed-neutron emission probability. α total of 420 implants were detected, and four correlated βn coincidences were observed
2011Da08: 73Co produced in the fragmentation of 57.8 MeV/nucleon 86Kr beam impinged on 50 mg/cm2 thick tantalum target using LISE-2000 spectrometer at GANIL facility. Detector system included a three-element Si-detector telescope containing a double-sided silicon-strip detector (DSSSD) backed by a Si(Li) detector and surrounded by four clover type EXOGAM Ge detectors. Reaction products identified by mass, atomic number, charge, energy loss and time of flight. Measured half-life of 73Co decay
2012Ra10 (also 2005Ma95): 73Co produced by fragmentation of 86Kr beam at 140 MeV/nucleon with a 9Be target at NSCL facility followed by fragment separation using A1900 fragment separator. Particle identification by energy loss and time-of-flight techniques. The ions were implanted in double-sided silicon strip (DSSD) detectors for fragment β detection. SeGA gamma-detector array containing 16 HPGe detectors was used for Eγ, Iγ, γγ, βγ coin, ion-β correlations and isotopic half-life measurements. Detailed shell-model calculations using NR78 residual interaction.
2014Xu07 (also 2014XuZZ thesis): 73Co nuclide produced in 9Be(238U,F) reaction with 238U86+ beam of 345 MeV/nucleon produced at the RIKEN accelerator complex. Identification of 73Co nuclei was made on the basis of magnetic rigidity, time-of-flight and energy loss of the fragments (ΔE-Bρ-tof method) using BigRIPS fragment separator and ZeroDegree Spectrometer (ZDS) at RIBF-RIKEN facility. Isotopic yield measured based on α/Q spectrum and Z versus α/Q plot. Measured heavy fragments, β and γ spectra using wide-range active silicon strip stopper array (WAS3ABi) for β and ion detection, and EUROBALL-RIKEN Cluster array for γ detection. Decay curves were obtained from time differences between implantation and correlated β decays. See also 2015BeZR conference report for production of 73Co
Q-value: Estimated uncertainties (2017Wa10): 400 for Q(β-), 570 for S(n) and Q(α), and 640 for S(p).
Q-value: S(2n)=9190 610, S(2p)=36430 640, Q(β-n)=8740 400 (syst, 2017Wa10). Q(β-2n)=1845 400 (syst, deduced by evaluators from Q(β-) and S(2n) values in 2017Wa10).