ADOPTED LEVELS, GAMMAS for 118Ru
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 14-Jan-2022
Authors: B. Singh and B. Pritychenko | Citation: ENSDF | Cutoff date: 10-AUG-2013
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-NOV-2006
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=7890 keV SY | S(n)= 5580 keV SY | S(p)= 16150 keV SY | Q(α)= -9750 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 118Tc β- decay (30 MS) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | A | 0+ | 99 ms 3 % β- = 100 % β-n < 4.6 | ||||
| 327.6 3 | A | (2+) | 327.64 25 | 100 | 0.0 | 0+ | |
| 647.8 4 | A | (2+) | 320.24 25 646.5 4 ? | 100 10 22 9 | 327.6 0.0 | (2+) 0+ | |
| 809.9 4 | A | (4+) | 482.27 26 | 100 | 327.6 | (2+) | |
| 921.1 4 | A | (3+) | 273.50 32 593.35 29 | 100 31 35 10 | 647.8 327.6 | (2+) (2+) | |
| 1180.5 5 | A | (4+) | 532.75 28 | 100 | 647.8 | (2+) | |
| 1415.6 5 | A | (6+) | 605.68 26 | 100 | 809.9 | (4+) | |
E(level): From least-squares fit to Eγ values
Jπ(level): From Adopted Levels, based on systematics of even-even nuclei for the first 2+ and 4+ states, and from comparison with IBM-1 model calculations for higher states (2013So17)
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 1 - g.s. band. | |||||||
| 0.0 | 0+ | 99 ms 3 % β- = 100 % β-n < 4.6 | |||||
| 327.6 3 | (2+) | 327.64 25 | 100 | 0.0 | 0+ | ||
| 809.9 4 | (4+) | 482.27 26 | 100 | 327.6 | (2+) | ||
| 1415.6 5 | (6+) | 605.68 26 | 100 | 809.9 | (4+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 2 - γ band. | |||||||
| 647.8 4 | (2+) | ||||||
| 921.1 4 | (3+) | 273.50 32 593.35 29 | 100 31 35 10 | 647.8 327.6 | (2+) (2+) | ||
| 1180.5 5 | (4+) | 532.75 28 | 100 | 647.8 | (2+) | ||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 99 ms 3 % β- = 100 % β-n < 4.6 | %β-n or Pn measured by 2021Ha19 from (implanted ions)βn-correlated events. E(level): %β-n or Pn measured by 2021Ha19 from (implanted ions)βn-correlated events. g.s. band. |
| 327.6 | (2+) | E(level): g.s. band. | |
| 647.8 | (2+) | E(level): γ band. | |
| 809.9 | (4+) | E(level): g.s. band. | |
| 921.1 | (3+) | E(level): γ band. | |
| 1180.5 | (4+) | E(level): γ band. | |
| 1415.6 | (6+) | E(level): g.s. band. |
Mass measurement: 2016Kn03
1998Do08: 208Pb(238U,X) E=750 MeV/nucleon. Fragment recoil separator (FRS) at GSI facility. Fragments separated by magnetic rigidity, mass and total kinetic energy distribution. Measured (fragment)(β and/or γ) coincidence. Tentative evidence for the formation of 118Ru with a measured fractional yield of 0.003 2.
1994Be24 (from the same lab as 1998Do08): same reaction as in 1998Do08, measured σ=2 μb with three counts assigned to 118Ru
2006Mo07: identification and production of 118Ru in 9Be(136Xe,X) reaction at E136Xe=121.8 MeV/nucleon. The A1900 fragment separator at NSCL facility at MSU was used to separate nuclei of interest. The secondary beam was implanted into β-decay arrangement consisting of Si(PIN) detectors and Si strip detectors (DSSD) and single-sided Si strip detectors (SSSD). Implantation and decay events were time stamped and correlated. Measured half-life from β spectrum.
2015Lo04: measured half-life from ion-β correlations, isotope produced in 9Be(238U,F) reaction at E=345 MeV/nucleon at RIKEN facility
2021Ha19: 118Ru produced in 9Be(238U,F),E=345 MeV/nucleon at the RBIF-RIKEN accelerators. Identification of 118Ru made on the basis of magnetic rigidity, time-of-flight and energy loss using the BigRIPS separator and ZeroDegree spectrometer. The separated nuclei were sent to the Advanced Implantation Detector Array (AIDA) for the detection of implanted ions and subsequent β- and β--delayed neutrons using six double-sided silicon-strip detector (DSSDs) for particles, and BRIKEN neutron counter array of 140 3He proportional counters embedded in a high-density polyethylene (HDPE) matrix. Measured (implanted ions)-β and (implanted ions)-β-n correlated events to deduce half-life of decay and delayed-neutron emission probability (%β-n or (P1n). Comparison of measured half-lives and Pn values with several theoretical calculations
Production cross sections and yields of 118Ru:
2021Su01: measured production cross section in 9Be(238U,F), E=345 MeV/nucleon at RIBF-RIKEN facility.
2020Su23: measured production cross section in 9Be(132Sn,X), E=278 MeV/nucleon at RIBF-RIKEN facility.
2019Pe09: measured production σ in 208Pb(238U,F), E=950 MeV/nucleon at GSI facility.
Theoretical calculations: 16 primary references (13 for structure and three for half-lives and decay modes) from the NSR database available at www.nndc.bnl.gov/nsr/ are listed in the ’document’ records in this dataset.
Levels: Bands are proposed by 2013So17 based on IBM-1 model calculations
Q-value: Estimated uncertainties (2021Wa16): 200 for Q(β-), 480 for S(n), 450 for S(p), 360 for Q(α) (2021Wa16)
Q-value: S(2n)=9070 200, S(2p)=30370 540, Q(β-n)=3830 200 (syst, 2021Wa16).