New isomer and decay half-life of {sup 115}Ru

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.064318· OSTI ID:21499270

Kurpeta, J; Plochocki, A ^[1]; Rissanen, J; Elomaa, V -V; Eronen, T; Hakala, J; Jokinen, A; Kankainen, A; Karvonen, P; Moore, I D; Penttilae, H; Saastamoinen, A; Weber, C; Aeystoe, J ^[2]; Urban, W ^[1]; Malkiewicz, T ^[2]; Simpson, G S ^[3]

---

1. Faculty of Physics, University of Warsaw, ul. Hoza 69, PL-00681 Warsaw (Poland)
2. Department of Physics, University of Jyvaeskylae, P. O. Box. 35, FI-40014, Jyvaeskylae (Finland)
3. LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex (France)

Exotic, neutron-rich nuclei of mass A=115 produced in proton-induced fission of {sup 238}U were extracted using the IGISOL mass separator. The beam of isobars was transferred to the JYFLTRAP Penning trap system for further separation to the isotopic level. Monoisotopic samples of {sup 115}Ru nuclei were used for {gamma}and {beta} coincidence spectroscopy. In {sup 115}Ru we have observed excited levels, including an isomer with a half-life of 76(6) ms and (7/2{sup -}) spin and parity. The first excited 61.7-keV level in {sup 115}Ru with spins and parity (3/2{sup +}) may correspond to an oblate 3/2{sup +}[431] Nilsson orbital. A half-life of 318(19) ms for the {beta}{sup -} decay of the (1/2{sup +}) ground state in {sup 115}Ru has been firmly established in two independent measurements, a value which is significantly shorter than that previously reported.

• OSTI ID: 21499270
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevC.82.064318; (c) 2010 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
COINCIDENCE METHODS
EXCITED STATES
FISSION
HALF-LIFE
ISOMERS
KEV RANGE
MASS
NEUTRON-RICH ISOTOPES
NUCLEAR DECAY
PARITY
PROTON REACTIONS
PROTONS
RUTHENIUM 115
SPECTROSCOPY
SPIN
TRAPS
URANIUM 238
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COUNTING TECHNIQUES
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PARTICLE PROPERTIES
RADIOISOTOPES
RUTHENIUM ISOTOPES
SPONTANEOUS FISSION RADIOISOTOPES
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES