Identification of {gamma} rays from {sup 172}Au and {alpha} decays of {sup 172}Au, {sup 168}Ir, and {sup 164}Re

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.064310· OSTI ID:21296575

Hadinia, B ^[1]; Cederwall, B; Andgren, K; Baeck, T; Johnson, A; Khaplanov, A; Wyss, R ^[1]; Page, R D; Grahn, T; Paul, E S ^[2]; Sandzelius, M ^[1]; Scholey, C; Greenlees, P T; Jakobsson, U; Jones, P M; Julin, R; Juutinen, J; Ketelhut, S; Leino, M; Nyman, M ^[3]

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1. Department of Physics, Royal Institute of Technology, SE-10044 Stockholm (Sweden)
2. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
3. Department of Physics, University of Jyvaeskylae, FIN-40014 Jyvaeskylae (Finland)

The very neutron deficient odd-odd nucleus {sup 172}Au was studied in reactions of 342 and 348 MeV {sup 78}Kr beams with an isotopically enriched {sup 96}Ru target. The {alpha} decays previously reported for {sup 172}Au were confirmed and the decay chain extended down to {sup 152}Tm through the discovery of a new {alpha}-decaying state in {sup 164}Re[E{sub {alpha}}=5623(10) keV; t{sub 1/2}=864{sub -110}{sup +150} ms; b{sub {alpha}}=3(1)%]. Fine structure in these {alpha} decays of {sup 172}Au and {sup 168}Ir were identified. A new {alpha}-decaying state was also observed and assigned as the ground state in {sup 172}Au[E{sub {alpha}}=6762(10) keV; t{sub 1/2}=22{sub -5}{sup +6} ms]. This decay chain was also correlated down to {sup 152}Tm through previously reported {alpha} decays. Prompt {gamma} rays from excited states in {sup 172}Au have been identified using the recoil-decay tagging technique. The partial level scheme constructed for {sup 172}Au indicates that it has an irregular structure. Possible configurations of the {alpha}-decaying states in {sup 172}Au are discussed in terms of the systematics of nuclei in this region and total Routhian surface calculations.

• OSTI ID: 21296575
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
BEAMS
CONFIGURATION
EXCITED STATES
FINE STRUCTURE
GAMMA RADIATION
GOLD 172
GROUND STATES
IRIDIUM 168
KEV RANGE
KRYPTON 78
MEV RANGE 100-1000
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
ODD-ODD NUCLEI
RECOILS
RHENIUM 164
RUTHENIUM 96 TARGET
THULIUM 152