Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session DE: Mini-symposium on Strangeness Nuclear Physics Today and Tomorrow II
9:00 AM–11:30 AM,
Thursday, October 25, 2018
Hilton
Room: King's 1
Chair: Hirokazu Tamura, Tohoku University
Abstract ID: BAPS.2018.HAW.DE.6
Abstract: DE.00006 : Preparation status of the hypernuclear gamma-ray spectroscopy for Λ's g-factor in a nucleus (J-PARC E63)*
10:15 AM–10:30 AM
Presenter:
Honoka Kanauchi
(Tohoku University)
Authors:
Honoka Kanauchi
(Tohoku University)
Yuji Ishikawa
(Tohoku University)
Mifuyu Ukai
(KEK)
Takeshi Koike
(Tohoku University)
Hirokazu Tamura
(Tohoku University)
Ryotaro Honda
(Tohoku University)
Manami Fujita
(Tohoku University)
Takeshi Yamamoto
(KEK)
Properties of baryons in nuclear matter may be changed from those in free space because of its high density. However, nucleons deep inside a nucleus cannot be probed due to very short life time of the highly excited states. On the other hand, hyperons are free from Pauli effect from nucleons in a nucleus. Thus, hyperons can be a good probe to investigate possible modification of baryons in a nucleus.
We plan to study modification of a Λ particle in a nucleus by measuring that of the magnetic moment. Λ's magnetic moment can be derived from the lifetime of spin flip M1 transition. Therefore we proposed a γ ray spectroscopy of hypernuclei (J-PARC E63) at the K1.1 beam line in J-PARC. We will measure the γ ray of spin flip M1 transition by Ge detectors array (Hyperball-J) to obtain the lifetime using Doppler Shift Attenuation Method (DSAM). DSAM is a method to obtain the lifetime from γ ray peak shape which is determined by lifetime and stopping time of hypernuclei in a nucleus. For this purpose, a lithium oxide target, which has uniform density, is very important. Now we are challenging to produce the crystal of lithium oxide.
In this presentation, we will introduce about the J-PARC E63 experiment and report the preparation status.
*Grant No. JP15H02079, No. JP24105003
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.DE.6
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