We describe the use of the 4tt CHIMERA charged particle detector as a large efficiency y-ray detector. The CsI(Tl) stage of the CHIMERA telescope is used to detect and identify y-rays. The high detection efficiency and the sufficient energy resolution guaranteed by CsI(Tl) allows us to use the detector for the study of rare decays. Two examples are reported: the low probability gamma decay (<10%) of the Pygmy resonance of a radioactive nucleus as the 68Ni; the measurement of the gamma decay probability of excited levels of 12C as the Hoyle state at 7.65 (∼10−4) MeV and the 3- level at 9.64 MeV (∼107), both important for the Carbon production in stars. Future experiments made possible at INFN-LNS by the availability of the new fragment separator FRAISE are also outlined.
Gamma ray detection with CHIMERA at LNS: Results and perspectives / Cardella G., Favela F., Martorana N.S., Acosta L., Andres M.V., Camaiani A., De Filippo E., De Luca S., Gelli N., Geraci E., Gnoffo B., Guazzoni C., Marin-Lambarri D.J., Lanza E.G., Lanzalone G., Maiolino C., Nannini A., Pagano A., Pagano E.V., Papa M., et al.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - ELETTRONICO. - 1561:(2020), pp. 0-0. (Detection Systems and Techniques in Nuclear and Particle Physics (DeSyT2019) ) [10.1088/1742-6596/1561/1/012007].
Gamma ray detection with CHIMERA at LNS: Results and perspectives
Camaiani A.;Nannini A.;Pirrone S.;Politi G.;Quattrocchi L.;
2020
Abstract
We describe the use of the 4tt CHIMERA charged particle detector as a large efficiency y-ray detector. The CsI(Tl) stage of the CHIMERA telescope is used to detect and identify y-rays. The high detection efficiency and the sufficient energy resolution guaranteed by CsI(Tl) allows us to use the detector for the study of rare decays. Two examples are reported: the low probability gamma decay (<10%) of the Pygmy resonance of a radioactive nucleus as the 68Ni; the measurement of the gamma decay probability of excited levels of 12C as the Hoyle state at 7.65 (∼10−4) MeV and the 3- level at 9.64 MeV (∼107), both important for the Carbon production in stars. Future experiments made possible at INFN-LNS by the availability of the new fragment separator FRAISE are also outlined.
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