ADOPTED LEVELS, GAMMAS for 77Cu
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-SEP-2020
Authors: Balraj Singh, Ninel Nica | Citation: Nucl. Data Sheets 113, 1115 (2012) | Cutoff date: 30-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=9926.4 keV 23 | S(n)= 5958.1 keV 71 | S(p)= 14522 keV SY | Q(α)= -13868 keV SY | ||
| Reference: 2017WE16,2017WA10 |
| References: | |||
| A | 77Ni β- decay (158.9 MS) | B | 9Be(78Zn,pγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0 | AB | 5/2- | 469.8 ms 20 % β- = 100 % β-n = 30.1 20 | ||||
| 293 1 | AB | (3/2-) | 293 1 | 100 | 0 | 5/2- | |
| 946 1 | AB | (9/2-) | 946 1 | 100 | 0 | 5/2- | |
| 1154 1 | A | (7/2-) | 860 1 1154 1 | 78 9 100 9 | 293 0 | (3/2-) 5/2- | |
| 1776 1 | A | (13/2-) | 830 1 | 100 | 946 | (9/2-) | |
| 1955 1 | A | (11/2-) | 179 1 801 1 1009 1 | 51 11 63 12 100 14 | 1776 1154 946 | (13/2-) (7/2-) (9/2-) | |
| 2068 1 | AB | (7/2-) | 2068 1 | 100 | 0 | 5/2- | |
| 2605 2 | A | (11/2,13/2-) | 829 1 | 100 | 1776 | (13/2-) | |
| 2695 2 ? | A | (7/2-) | 2402 1 ? | 100 | 293 | (3/2-) | |
| 2869 2 | A | (11/2,13/2-) | 1093 1 | 100 | 1776 | (13/2-) | |
| 2909 2 | A | (9/2,11/2-) | 1133 1 | 100 | 1776 | (13/2-) | |
| 3412 2 | A | (9/2,11/2-) | 543 1 1636 1 | 70 20 100 20 | 2869 1776 | (11/2,13/2-) (13/2-) | |
| 3954 2 | A | (7/2,9/2,11/2-) | 3008 1 | 100 | 946 | (9/2-) | |
E(level): Deduced from least-squares fit to Eγ data
Jπ(level): As assigned by 2017Sa32 in their level-scheme Fig. 3, based partly on shell-model calculations. The ground-state spin of 5/2 is measured by 2011Ko36
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 5/2- | 469.8 ms 20 % β- = 100 % β-n = 30.1 20 | μ=+1.5963 17 (2017De30,2019StZV), Q=-0.26 3 (2017De30) Measured change in the mean-squared charge radius: δ<r2>(65Cu,77Cu)=+0.59 fm2 2(stat) 11(syst) (2020De21, collinear resonance ionization spectroscopy at ISOLDE-CERN). E(level): Measured change in the mean-squared charge radius: δ<r2>(65Cu,77Cu)=+0.59 fm2 2(stat) 11(syst) (2020De21, collinear resonance ionization spectroscopy at ISOLDE-CERN). |
| 293 | (3/2-) | XREF: B(271). | |
| 946 | (9/2-) | XREF: B(902). | |
| 2068 | (7/2-) | XREF: B(2068). |
| E(level) | E(gamma) | Comments |
1987Ar21, 1989BeYL, 1991Kr15: 77Cu nucleus identified in thermal neutron fission of 235U
1997Be12: 77Cu is also produced in (238U,X) on Pb and Be targets followed by fragment separation
2009Pa35: 77Cu produced in the fission of uranium (target=uranium carbide) by spallation neutrons which were produced by 1 GeV protons hitting a tantalum target. The 77Cu nuclei were selected by Resonant Ionization Laser Ion Source (RILIS) and General Purpose mass separator (GPS) at the CERN-ISOLDE facility. The separated 77Cu nuclei at a typical energy of 60 keV were implanted on a tape surrounded by three E-ΔE plastic detectors for β-particle detection and two HPGe detectors. Measured γ, βγ coin, ββ coin, γγ coin and delayed-neutron events. The neutrons were detected with the Mainz neutron long counter. The main contamination was from Ga activity. In the presence of the impurities, singles β spectrum could not be obtained
2009Il01, 2009Wi03 (also 2009Gr06): 77Cu isotope produced in the reaction 238U(p,F) with a 50 MeV beam provided by the HRIBF facility at ORNL, RIB facility. The radioactive beams were extracted and mass separated. Detected decay products with a Micro-channel plate detector, an ionization chamber and a moving tape collector. Measured γ, β, γγ and βγ coin with two plastic β-detectors and γ-rays with four clover Germanium detectors. According to 2009Gr06 there is no evidence of an isomer in 77Cu which may decay to positive-parity states in 77Zn
2017De30: 77Cu produced in 1.4-GeV proton bombardment of UCx target using HRS mass separator, ISCOOL gas-filled segmented linear Paul trap, and RILIS at ISOLDE-CERN facility. Measured hyperfine spectra, hyperfine structure parameters, magnetic dipole moment and electric quadrupole moment by Collinear Resonance Ionization Spectroscopy (CRIS).
2017We16: measured mass excess by tof ion-cyclotron resonance. Measured mass excess(77Cu)=-48862.8 keV 12 (2017We16) as compared to -48620 keV 150 (2017Wa10, from systematic trend)
Nuclear structure theory calculations: 2012Sr02: 5/2- predicted for g.s. in shell model calculations with LSSM-III interaction
Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for 12 primary theory references dealing with nuclear structure calculations, and radioactive decays.
Q-value: Estimated uncertainties: 400 for S(p) and Q(α)
Q-value: Q(β-n)=5362.9 19, S(2n)=10534.1 26, S(2p)=33791 500 (syst)
Q-value: The Q values and separation energies have been deduced by the evaluator from measured mass excesses for 77Cu and 77Cu by 2017We16 and others from 2017Wa10.