Lifetime measurement of the 167.1 keV state in {sup 41}Ar

Journal Article · Thu Nov 15 00:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.057303· OSTI ID:21067943

White, E R ^[1]; Mach, H ^[2]; Fraile, L M ^[3]; Koester, U ^[3]; Arndt, O ^[4]; Blazhev, A; Braun, N; Fransen, C; Jolie, J ^[5]; Boelaert, N ^[5]; Borge, M J. G.; Boutami, R; Reillo, E -M; Tengblad, O ^[6]; Bradley, H ^[7]; Dlouhy, Z; Ugryumov, V ^[8]; Fynbo, H O. U. ^[9]; Hinke, Ch; Kroell, T ^[10]

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1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46616 (United States)
2. Institute for Structure and Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46616 (United States)
3. ISOLDE, PH Department, CERN, CH-1211 Geneva 23 (Switzerland)
4. Institut fuer Kernchemie, Universitaet Mainz, Fritz-Strassmann Weg 2, D-55128 Mainz (Germany)
5. Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicherstrasse 77, D-50937 Koeln (Germany)
6. Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain)
7. Department of Nuclear and Particle Physics, Uppsala University, Post Office Box 535, S-75121 Uppsala (Sweden)
8. Nuclear Physics Institute, AS CR, CZ-25068, Rez (Czech Republic)
9. Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000 Aarhus C (Denmark)
10. Physics Department, Technical University Munich, D-85748 Garching (Germany)

The Advanced-Time-Delayed method was used to measure lifetimes of the states in {sup 41}Ar populated in the {beta} decay of {sup 41}Cl. The nuclei {sup 41}Cl were produced at ISOLDE by 1.4-GeV proton bombardment of a thick UC{sub x} target and mass-separated as molecular ions, XeCl{sup +}. Our measured half-life of the 167.1-keV state, T{sub 1/2}=315(15) ps, is significantly lower than the previously measured value of 410(30) ps. We have also determined T{sub 1/2}=260(80) ps and T{sub 1/2}{<=}46 ps for the 515.9- and 1867.7-keV states, respectively. These are the shortest lifetimes measured so far with the ultrafast timing method using the new LaBr{sub 3}(Ce) crystals for {gamma}-ray detection.

• OSTI ID: 21067943
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 76, Issue 5; Other Information: DOI: 10.1103/PhysRevC.76.057303; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 41
BETA DECAY
CHLORINE 41
CRYSTALS
GAMMA DETECTION
GEV RANGE
HALF-LIFE
KEV RANGE
LANTHANUM BROMIDES
LIFETIME
MOLECULAR IONS
PROTONS
SOLID SCINTILLATION DETECTORS
TIME DELAY