Excited states in the heavy nuclide {sup 254}No

Journal Article · Tue Nov 16 04:00:00 EST 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1301790· OSTI ID:21207546

Kankaanpaeae, H; Leino, M; Cocks, J F. C.; Dorvaux, O; Helariutta, K; Jones, P; Julin, R; Juutinen, S; Kettunen, H; Kuusiniemi, P; Muikku, M; Nieminen, P; Rahkila, P; Savelius, A; Trzaska, W H ^[1]; Herzberg, R -D; Chewter, A J; Butler, P A; Greenlees, P T; Jones, G D ^[2]

---

1. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40351 Jyvaeskylae (Finland)
2. Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom)

In-beam {gamma}-ray spectroscopy of the excited states in the heavy nuclide {sup 254}No have been studied in the reaction {sup 208}Pb({sup 48}Ca,2n){sup 254}No. The techniques of recoil-gating and recoil-decay-tagging were needed due to the dominant fission background. Prompt {gamma}-rays were detected with a Ge detector array, consisting of four clover detectors in close geometry, and a gas-filled recoil separator (RITU) was used for detecting recoils and their {alpha}-decays. The observed six {gamma}-rays were associated with E2-transitions in the ground state rotational band of {sup 254}No. The value {beta}{sub 2}=0.27{+-}0.03 was extracted for the quadrupole deformation from the extrapolated 2{sup +} excitation energy.

• OSTI ID: 21207546
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 495; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
CALCIUM 48 REACTIONS
E2-TRANSITIONS
FISSION
GAMMA RADIATION
GAMMA SPECTROSCOPY
GE SEMICONDUCTOR DETECTORS
GROUND STATES
HEAVY ION FUSION REACTIONS
LEAD 208 TARGET
NOBELIUM 254
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
QUADRUPOLES
RADIOACTIVE ION BEAMS
RECOILS
ROTATIONAL STATES