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Event > Regular 
 Search for Double Gamow-Teller Giant Resonances ... ( 2018.5.31. 16:30)  HIT[23] 29 May 2018 

- 콜 로 키 움 -

 

■ 제목: Search for Double Gamow-Teller Giant Resonances in Nuclei and its Impact to Double Beta-decay studies
■ 연사: Dr. Tomohiro UESAKA(일본 이화학연구소(RIKEN)
■ 일시: 2018년 5월 31일(목) 오후 4:30
            다과회 4:15∼4:30
■ 장소: 제1과학관 206호
■ 요약:

 Double beta decay is the slowest decay mode in nuclei and has a typical life time longer than 1019 years. This is a consequence of small Q values and tiny nuclear matrix elements, double Gamow-Teller matrix elements, linking the parent and grand-daughter nuclei. A special type of double beta decay, neutrinoless double beta decay, can be a direct evidence of Majorana nature of neutrinos and has been subject to world-wide efforts for the discovery.
Once it is discovered, new properties of neutrinos will be extracted through the use of nuclear matrix elements. However, the nuclear matrix elements for the relevant transition, double Gamow-Teller transition, have been hardly investigated so far and its theoretical predictions are quite difficult.
We started an experimental program to investigate double Gamow-Teller transitions in a wide excitation energy range with a newly invented experimental method to use the (12C,12Beγ) reaction. One of the highlight of the program is a discovery of the double Gamow-Teller giant resonances that exhaust a major part of the sum-rule value. The first experiment was carried out with a 100-MeV 12C beam at RCNP, Osaka University. We have found indication of the double Gamow-Teller giant resonances in 48Ca which is among double beta-decay nuclei. We plan high-statistics experiments with a high intensity 12C beam at RI Beam Factory(RIBF) which will  be scheduled in 2019.
In the colloquium, I will present results of the RCNP experiment and show future plans at RIBF, after brief introduction to double beta-decay physics and explanation of relevance of our experiments to the physics.

 

학생들의 많은 참여 바랍니다(누구나 참석 가능).

 

경북대학교 대학원 물리학과
경북대학교 기초과학인재양성사업단
경북대학교 고에너지물리연구소

 

 

 

No Subject File Date
113 Search for Double Gamow-Teller Giant Resonances ... ( 2018.5.31. 16:30)        29 May 2018
112 Spin-Lattice Relaxation Time in Prostate tissue at the Earth’s magnetic field (2018.5.24. 16:30)        16 May 2018
111 선형가속기와 플라스마 물리학 (2018년 5월 3일 목 오후 4:30)        2 May 2018
110 Study of nucleon 3D structure at Jefferson Lab with CLAS (2018.04.24.)        23 Apr 2018
109 RI beam production using a BigRIPS in-flight separator (2018년 4월 12일)        13 Apr 2018
108 경주 양성자가속기로 무엇을 하는가 (2018년 3월 29일)        13 Apr 2018
107 Workshop On Nuclear Data Measurement and Related Subject (2017.12.22.)        27 Dec 2017
106 2nd Workshop on KNO (2017.11.24. NS1 Room 120)        24 Nov 2017
105 고에너지물리학 심포지움 프로그램 안내 (2017.05.19. 만촌동 인터불고 아망떼홀)        19 May 2017
104 세미나 개최 (Efforts for the 2nd Hyper-Kamiokande detector in Korea, 서울대 김수봉 교수) - 2016.10.26.        25 Oct 2016
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