High-spin octupole yrast levels in {sup 216}Rn{sub 86}

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.024314· OSTI ID:20771265

Debray, M E ^[1]; Davidson, J; Davidson, M ^[2]; Kreiner, A J; Cardona, M A ^[1]; CONICET, 1033 Buenos Aires ^[3]; Hojman, D ^[1]; CONICET, 1033 Buenos Aires ^[3]; Napoli, D R; De Angelis, G; De Poli, M; Gadea, A ^[4]; Lenzi, S; Bazzacco, D; Lunardi, S; Rossi-Alvarez, C; Ur, C A ^[5]; Medina, N ^[6]

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1. Departamento de Fisica, Comision Nacional de Energia Atomica, 1429 Buenos Aires (Argentina)
2. CONICET, 1033 Buenos Aires (Argentina)
3. Argentina
4. INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy)
5. Dipartimento di Fisica, Sezione di Padova, Padova (Italy)
6. Departamento de Fisica Nuclear, Universidade de Sao Paulo (Brazil)

The yrast level structure of {sup 216}Rn has been studied using in-beam spectroscopy {alpha}-{gamma}-{gamma} coincidence techniques through the {sup 208}Pb({sup 18}O, 2{alpha}2n) reaction in the 91-93 MeV energy range, using the 8{pi} GASP-ISIS spectrometer at Legnaro. The level scheme of {sup 216}Rn resulting from this study shows alternating parity bands only above a certain excitation energy. From this result, the lightest nucleus showing evidence of octupole collectivity at low spins is still {sup 216}Fr, thereby defining the lowest-mass corner for this kind of phenomenon as N{>=}129 and Z{>=}87.

• OSTI ID: 20771265
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITATION
FRANCIUM 216
IN-BEAM SPECTROSCOPY
LEAD 208 TARGET
MEV RANGE
NUCLEAR STRUCTURE
OCTUPOLES
OXYGEN 18 REACTIONS
PARITY
RADON 216
SPIN
YRAST STATES