First observation of the decay of a 15 − seniority v = 4 isomer in 128 Sn
نویسندگان
چکیده
S. Pietri,1 A. Jungclaus,2,* M. Górska,1 H. Grawe,1 M. Pfützner,3 L. Cáceres,1,4,† P. Detistov,5 S. Lalkovski,5 V. Modamio,2,4 Z. Podolyák,6 P. H. Regan,6 D. Rudolph,7 J. Walker,2,4 E. Werner-Malento,3 P. Bednarczyk,8 P. Doornenbal,1,‡ H. Geissel,1 J. Gerl,1 J. Grebosz,8 I. Kojouharov,1 N. Kurz,1 W. Prokopowicz,1 H. Schaffner,1 H. J. Wollersheim,1 K. Andgren,9 J. Benlliure,10 G. Benzoni,11 A. M. Bruce,12 E. Casarejos,10,§ B. Cederwall,9 F. C. L. Crespi,11 B. Hadinia,9 M. Hellström,7 R. Hoischen,1,7 G. Ilie,13,‖ A. Khaplanov,9 M. Kmiecik,8 R. Kumar,14 A. Maj,8 S. Mandal,15 F. Montes,1 S. Myalski,8 G. Simpson,16 S. J. Steer,6 S. Tashenov,1 and O. Wieland11 1Gesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, Germany 2Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain 3Faculty of Physics, University of Warsaw, PL-00681 Warsaw, Poland 4Departamento de Fı́sica Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain 5Faculty of Physics, University of Sofia, BG-1164 Sofia, Bulgaria 6Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom 7Department of Physics, Lund University, S-22100 Lund, Sweden 8The Henryk Niewodniczaski Institute of Nuclear Physics, PL-31342 Cracow, Poland 9KTH Stockholm, S-10691 Stockholm, Sweden 10Universidad de Santiago de Compostela, E-175706 Santiago de Compostela, Spain 11INFN sezione di Milano, I-20133 Milano, Italy 12School of Engineering, University of Brighton, Brighton, BN2 4GJ, United Kingdom 13Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany 14Inter University Accelerator Centre, New Delhi, India 15University of Delhi, New Delhi, India 16Institut Laue-Langevin, F-38042 Grenoble, France
منابع مشابه
0 50 90 20 v 2 1 4 Fe b 20 07 Beta decay of 115 In to the first excited level of 115 Sn : potential outcome for neutrino mass
Recent observation of β decay of 115 In to the first excited level of 115 Sn with an extremely low Q β value (Q β ≤ O(1) keV) could be used to set a limit on neu-trino mass. To give restriction potentially competitive with those extracted from experiments with 3 H (≃2 eV) and 187 Re (≃15 eV), atomic mass difference between 115 In and 115 Sn and energy of the first 115 Sn level should be remeasu...
متن کامل- ex / 0 50 90 20 v 1 1 5 Se p 20 05 Beta decay of 115 In to the first excited level of 115 Sn : potential outcome for neutrino mass
Recent observation of β decay of 115 In to the first excited level of 115 Sn with an extremely low Q β value (Q β ≤ O(1) keV) could be used to set a limit on neu-trino mass. To give restriction potentially competitive with those extracted from experiments with 3 H (≃2 eV) and 187 Re (≃15 eV), atomic mass difference between 115 In and 115 Sn and energy of the first 115 Sn level should be remeasu...
متن کاملYrast 6⁺ seniority isomers of (136,138)Sn.
Delayed γ-ray cascades, originating from the decay of (6⁺) isomeric states, in the very neutron-rich, semimagic isotopes (136,138)Sn have been observed following the projectile fission of a ²³⁸U beam at RIBF, RIKEN. The wave functions of these isomeric states are proposed to be predominantly a fully aligned pair of f(7/2) neutrons. Shell-model calculations, performed using a realistic effective...
متن کاملl - ex / 0 40 70 16 v 1 1 6 Ju l 2 00 4 Observation of β decay of 115 In to the first excited level of 115 Sn
In the context of the LENS R&D solar neutrino project, the γ spectrum of a sample of metallic indium was measured using a single experimental setup of 4 HP-Ge detectors located underground at the Gran Sasso National Laboratories (LNGS), Italy. A γ line at the energy (497.48±0.21) keV was found that is not present in the background spectrum and that can be identified as a γ quantum following the...
متن کاملInvestigation of the Kπ = 8− Isomers in N=74 Isotones on Beam of the Warsaw Cyclotron
The decay of the K= 8− isomers in Ce and Nd have been investigated on the beam of the Warsaw Cyclotron using OSIRIS array. Reactions Sn(O,4n)Ce and Sn(Ne,4n)Nd were used. Two new decay paths have been found in the deexcitation of the 8− isomer in Ce. The hindrance factors for the E1, M2 and E3 transitions deexciting the isomer have been determined. Similar E3 decay of the 410 μs isomeric state ...
متن کامل