Search for one-phonon mixed-symmetry states in the radioactive nucleus {sup 140}Nd

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.037302· OSTI ID:21419571

Gladnishki, K A; Damyanova, A; Danchev, M; Karagyozov, D; Topchiyska, R ^[1]; Rainovski, G ^[1]; Petkov, P ^[2]; Jolie, J; Blazhev, A; Dewald, A; Fransen, C; Hackstein, M; Pissulla, T; Rother, W ^[2]; Pietralla, N; Moeller, O; Reese, M ^[3]

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1. Faculty of Physics, St. Kliment Ohridski University of Sofia, BG-1164 Sofia (Bulgaria)
2. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany)
3. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

Low-spin excited states of {sup 140}Nd have been studied via the {sup 140}Ce({sup 3}He,3n){sup 140}Nd reaction. The data show that one of the candidates for the one-phonon mixed-symmetry state (MSS) of {sup 140}Nd, namely, the 2{sub 3}{sup +} state at 2140 keV with an effective lifetime of 220(90) fs, exhibits a fast M1 decay to the 2{sub 1}{sup +} state. Thus, this state can be considered, at least, as a fragment of the one-phonon MSS of {sup 140}Nd. This is the first example where mixed symmetry character is tentatively assigned to a state of an unstable nucleus from the mass A{approx_equal}140 region based on the data on absolute M1 transition rates. However, the data are not conclusive on whether this decay exhausts the total M1 strength or whether the one-phonon MSS of {sup 140}Nd is fragmented.

• OSTI ID: 21419571
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
CERIUM 140 TARGET
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITED STATES
HELIUM 3
HELIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIFETIME
LIGHT NUCLEI
M1-TRANSITIONS
MASS
MULTIPOLE TRANSITIONS
NEODYMIUM 140
NEODYMIUM ISOTOPES
NEUTRON EMISSION
NUCLEAR DECAY
NUCLEAR FRAGMENTATION
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
PHONONS
QUASI PARTICLES
RADIOISOTOPES
RARE EARTH NUCLEI
SPIN
STABLE ISOTOPES
SYMMETRY
TARGETS