Radiative strength functions of germanium from thermal neutron capture

Journal Article · Thu Feb 28 23:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.1086· OSTI ID:6042352

Islam, M A; Kennett, T J; Prestwich, W V ^[1]

---

1. Department of Physics, McMaster University, Hamilton, Ontario, Canada L8S 4K1 (CA)

Thermal neutron capture gamma rays from germanium have been studied using an internal irradiation facility and a pair spectrometer. Energy and intensity of transitions in four germanium isotopes were determined and their level and separation energies inferred. The separation energies are {ital S}{sub {ital n}} ({sup 71}Ge)=7415.95{plus minus}0.05 keV, {ital S}{sub {ital n}} ({sup 73}Ge)=6782.94{plus minus}0.05 keV, {ital S}{sub {ital n}} ({sup 74}Ge)=10 196.31{plus minus}0.07 keV, and {ital S}{sub {ital n}} ({sup 75}Ge)=6505.26{plus minus}0.08 keV. The {ital E}1 reduced strength function, {l angle}{Gamma}{sub {gamma}{ital i}D}{sup {minus}1}{ital E}{sub {ital i}}{sup {minus}3}{ital A{minus}2/3}{r angle}, of these germanium isotopes was found to be (1.8{plus minus}0.5){times}10{sup {minus}9} MeV{sup {minus}3}, a value lower than the global average. The {ital M}1 strength function {l angle}{Gamma}{sub {gamma}{ital i}D}{sup {minus}1}{ital E}{sub {ital i}}{sup {minus}3}{r angle} of {sup 74}Ge was estimated to be (20{plus minus}9){times}10{sup {minus}9} MeV{sup {minus}3} which agrees with the global average. The average {ital B}({ital E}2){bar {down arrow}} of {sup 74}Ge using the present thermal data and the previous resonance data from literature was found to be 18{plus minus}10{ital e}{sup 2} fm{sup 4} MeV {sup {minus}1} which agrees with the value predicted by the Axel-Brink hypothesis.

• OSTI ID: 6042352
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651620* -- Nuclear Properties & Reactions
A=59-89
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
CAPTURE
DAYS LIVING RADIOISOTOPES
E1-TRANSITIONS
E2-TRANSITIONS
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FUNCTIONS
GAMMA SPECTROSCOPY
GE SEMICONDUCTOR DETECTORS
GERMANIUM 71
GERMANIUM 73
GERMANIUM 74
GERMANIUM 75
GERMANIUM ISOTOPES
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
M1-TRANSITIONS
MEASURING INSTRUMENTS
MULTIPOLE TRANSITIONS
NEUTRON REACTIONS
NEUTRON SEPARATION ENERGY
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIATION DETECTORS
RADIOISOTOPES
SECONDS LIVING RADIO
SECONDS LIVING RADIOISOTOPES
SEMICONDUCTOR DETECTORS
SPECTROSCOPY
STABLE ISOTOPES
STRENGTH FUNCTIONS