Primary yields of protons measured using CR-39 in laser-induceddeuteron–deuteron fusion reactions  

作　　者：Yue Zhang Long-Xiang Liu Hong-Wei Wang Yu-Gang Ma Bai-Fei Shen Guo-Qiang Zhang Mei-Rong Huang Aldo Bonasera Wen-Peng Wang Jian-Cai Xu Shun Li Gong-Tao Fan Xi-Guang Cao Yong Yu Jian-Jun He Chang-Bo Fu Suyalatu Zhang Xin-Rong Hu Xin-Xiang Li Zi-Rui Hao Jun-Wen Wang Han Xue Hai-Juan Fu 

机构地区：[1]Shanghai Institute of Applied Physics,CAS,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shanghai Advanced Research Institute,CAS,Shanghai 201210,China [4]Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [5]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,CAS,Shanghai 201800,China [6]Department of Physics,Shanghai Normal University,Shanghai 200234,China [7]CAS Center for Excellence in Ultra-Intense Laser Science,Shanghai 201800,China [8]College of Physics and Electronics Information,Inner Mongolia University for Nationalities,Tongliao 028000,China [9]Cyclotron Institute,Texas A&M University,College Station,TX 77843,USA [10]Laboratori Nazionali del Sud,INFN,Via Santa Sofia,62,95123 Catania,Italy [11]Key Laboratory of Beam Technology of Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China [12]ShanghaiTech University,Shanghai 201210,China [13]Shanghai University,Shanghai 200444,China

出　　处：《Nuclear Science and Techniques》2020年第6期90-98,共9页核技术（英文）

基　　金：supported in part by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB160203);the National Natural Science Foundation of China(Nos.11875311 and 11421505).

摘　　要：Investigating deuteron–deuteron(DD)fusion reactions in a plasma environment similar to the early stages of the Big Bang is an important topic in nuclear astrophysics.In this study,we experimentally investigated such reactions,using eight laser beams with the third harmonic impacting on a deuterated polyethylene target at the ShenGuang-II Upgrade laser facility.This work focused on the application of range-filter(RF)spectrometers,assembled from a 70 lm aluminum filter and two CR-39 nuclear track detectors,to measure the yields of primary DD-protons.Based on the track diameter calibration results of 3 MeV protons used to diagnose the tracks on the RF spectrometers,an approximate primary DD-proton yield of(8.5±1.7)×10^6 was obtained,consistent with the yields from similar laser facilities worldwide.This indicates that the RF spectrometer is an effective way to measure primary DD-protons.However,due to the low yields of D^3He-protons and its small track diameter,CR-39 detectors were unable to distinguish it from the background spots.Using other accurate detectors may help to measure these rare events.

关 键 词：Deuteron-deuteron fusion CR-39 Rangefilter spectrometer DD-proton 

分 类 号：TL641[核科学技术—核技术及应用]