Entry distribution, fission barrier, and formation mechanism of {sup 254}{ovr sub 102}No.

Journal Article · Mon Apr 17 04:00:00 EDT 2000 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.84.3542· OSTI ID:942819

Reiter, P; Khoo, T L; Lauritsen, T; Lister, C J; Seweryniak, D; Sonzogni, A A; Ahmad, I; Carpenter, M P; Cizewski, J A; Davids, C N; Greene, J P; Heinz, A; Henning, W F; Janssens, R V. F.; Kondev, F G; Siem, S; Uusitalo, J; Wiedenhoever, I

The entry distribution in angular momentum and excitation energy for the formation of {sup 254}No has been measured after the {sup 208}Pb({sup 48}Ca,2n) reaction at 215 and 219 MeV. This nucleus is populated up to spin 22{Dirac_h} and excitation energy {>=}6 MeV above the yrast line, with the half-maximum points of the energy distributions at -5 MeV for spins between 12{Dirac_h} and 22{Dirac_h}. This suggests that the fission barrier is {>=}5 MeV and that the shell-correction energy persists to high spin.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942819
• Report Number(s): ANL/PHY/JA-34925
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 16 ; Apr. 17, 2000 Vol. 84; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ENERGY SPECTRA
EXCITATION
FISSION BARRIER
NOBELIUM 254
SPIN