TAILIEUCHUNG - Evaluation of simultaneous fitting method for β-decay half lives and β-delayed multi neutron emission probabilities developed for the briken experiment
This paper presents a Monte-Carlo code to simulate the time sequences of the β-decay following implantation of a continuous radioactive ion beam into a segmented silicon detector. We extended our simulation to the β-delayed neutron process. An analysis procedure, which has been developed to obtain simultaneously the β-decay half-life and the β-delayed multi-neutron emission probability, was verified by the simulation data. | Communications in Physics, Vol. 28, No. 4 (2018), pp. 311-321 DOI: EVALUATION OF SIMULTANEOUS FITTING METHOD FOR β -DECAY HALF-LIVES AND β -DELAYED MULTI NEUTRON EMISSION PROBABILITIES DEVELOPED FOR THE BRIKEN EXPERIMENT VI HO PHONG1,2,† , SHUNJI NISHIMURA2 , LE HONG KHIEM3,4 1 Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi 2 RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan 3 Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam 4 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam † E-mail: phong@ Received 16 September 2018 Accepted for publication 29 October 2018 Published 15 December 2018 Abstract. This paper presents a Monte-Carlo code to simulate the time sequences of the β -decay following implantation of a continuous radioactive ion beam into a segmented silicon detector. We extended our simulation to the β -delayed neutron process. An analysis procedure, which has been developed to obtain simultaneously the β -decay half-life and the β -delayed multi-neutron emission probability, was verified by the simulation data. Keywords: Analysis methodology, Beta-delayed neutrons, Monte-Carlo simulation. Classification numbers: ;. I. INTRODUCTION The β decay of radioactive nuclei is one of the most fundamental weak-interaction process that occurs in the universe and across the chart of nuclei. An important property of the β decay is the characteristic half-life (T1/2 ), which is often the first experimentally accessible quantity for radioactive nuclei far from stability. The measurement of the β -decay half-life of the radioactive isotopes (RI) has attracted considerable attention in the field of nuclear structure, nuclear astrophysics and fundamental electroweak standard model. In particular, β decay half-life measures the .
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