본문

서브메뉴

35Cl(n, X) Cross Section Measurement
35Cl(n, X) Cross Section Measurement
35Cl(n, X) Cross Section Measurement

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151024
ISBN  
9798384451709
DDC  
539.76
저자명  
Nagel, Tyler Scott.
서명/저자  
35Cl(n, X) Cross Section Measurement
발행사항  
[Sl] : University of California, Berkeley, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
94 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Bernstein, Lee.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2024.
초록/해제  
요약Neutron induced reactions on Chlorine, especially 35Cl, have wide relevance across the nuclear science spectrum. The 35Cl(n, p0) 35S channel is particularly vital to the design of Molten Chloride Fast Reactors (MCFR) as it impacts core reactivity through neutron loss in the Chlorine based carrier salt. However, until 2019, very little experimental data existed for the relevant energy range. Secondary γ-ray production data for the 35Cl(n, p) 35S reaction are also needed for national security applications, including active neutron interrogation, yet there is currently no useful experimental data available. Gamma-ray data is also used in space exploration for detecting the isotopic makeup of extraterrestrial environments as well as in oil-well logging. To address these nuclear data needs, measurements of the 35Cl(n,x) reaction cross sections were conducted at Lawrence Berkeley National Laboratory's (LBNL) 88-inch cyclotron.The nuclear data evaluation process that produces the cross sections used for applications assumes a fixed total (n,x) cross section. The result is that an increase in one channel causes a corresponding decrease in one or more other evaluated channel(s). To address this aspect of nuclear data evaluation we performed a multi-component experiment whose goal was to measure all energetically possible reaction channels instead of using the more common single channel approach. The experiment consisted of three independent parts. First, the energy differential 35Cl(n, p0) 35S cross section was obtained using a CLYC detector as an active target. Second, energy-differential γ-ray production data for 35Cl(n, pγ) 35S and 35Cl(n, n'γ) 35Cl were obtained using the GENESIS array. This data was compared against (elsewhere produced) CoH3 theoretical calculations to inform model predictions as to the relative strength of available reaction channels. Finally, energy-integral 35Cl(n,p) and 35Cl(n,α) cross sections from activation were compared against CoH3. These allow verification of the inelastic channel strength obtained from the γ-ray data as well as determining the total 35Cl(n,α) channel strength which was not available from the other methods.Our results identify a ∼50% reduction in the magnitude of the 35Cl(n, p0) 35S cross section compared to the ENDF/B-VIII.0 evaluation. This result is consistent with a 2020 measurement by Kuvin et. al. Comparison of the γ-ray production data to CoH3 model calculations suggest that the elastic and/or inelastic channels must increase to compensate for the reduction observed in the (n, p0) channel.
일반주제명  
Nuclear engineering
일반주제명  
Nuclear physics
일반주제명  
Energy
일반주제명  
Inorganic chemistry
일반주제명  
Nuclear chemistry
일반주제명  
Computational physics
키워드  
Molten Chloride Fast Reactors
키워드  
Gamma-ray data
키워드  
Neutron induced reactions
키워드  
Chlorine
키워드  
Inelastic channels
기타저자  
University of California, Berkeley Nuclear Engineering
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017160466
■00520250211151024
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798384451709
■035    ▼a(MiAaPQ)AAI30996749
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a539.76
■1001  ▼aNagel,  Tyler  Scott.
■24510▼a35Cl(n,  X)  Cross  Section  Measurement
■260    ▼a[Sl]▼bUniversity  of  California,  Berkeley▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a94  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Bernstein,  Lee.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2024.
■520    ▼aNeutron  induced  reactions  on  Chlorine,  especially  35Cl,  have  wide  relevance  across  the  nuclear  science  spectrum.  The  35Cl(n,  p0)  35S  channel  is  particularly  vital  to  the  design  of  Molten  Chloride  Fast  Reactors  (MCFR)  as  it  impacts  core  reactivity  through  neutron  loss  in  the  Chlorine  based  carrier  salt.  However,  until  2019,  very  little  experimental  data  existed  for  the  relevant  energy  range.  Secondary  γ-ray  production  data  for  the  35Cl(n,  p)  35S  reaction  are  also  needed  for  national  security  applications,  including  active  neutron  interrogation,  yet  there  is  currently  no  useful  experimental  data  available.  Gamma-ray  data  is  also  used  in  space  exploration  for  detecting  the  isotopic  makeup  of  extraterrestrial  environments  as  well  as  in  oil-well  logging.  To  address  these  nuclear  data  needs,  measurements  of  the  35Cl(n,x)  reaction  cross  sections  were  conducted  at  Lawrence  Berkeley  National  Laboratory's  (LBNL)  88-inch  cyclotron.The  nuclear  data  evaluation  process  that  produces  the  cross  sections  used  for  applications  assumes  a  fixed  total  (n,x)  cross  section.  The  result  is  that  an  increase  in  one  channel  causes  a  corresponding  decrease  in  one  or  more  other  evaluated  channel(s).  To  address  this  aspect  of  nuclear  data  evaluation  we  performed  a  multi-component  experiment  whose  goal  was  to  measure  all  energetically  possible  reaction  channels  instead  of  using  the  more  common  single  channel  approach.  The  experiment  consisted  of  three  independent  parts.  First,  the  energy  differential  35Cl(n,  p0)  35S  cross  section  was  obtained  using  a  CLYC  detector  as  an  active  target.  Second,  energy-differential  γ-ray  production  data  for  35Cl(n,  pγ)  35S  and  35Cl(n,  n'γ)  35Cl  were  obtained  using  the  GENESIS  array.  This  data  was  compared  against  (elsewhere  produced)  CoH3  theoretical  calculations  to  inform  model  predictions  as  to  the  relative  strength  of  available  reaction  channels.  Finally,  energy-integral  35Cl(n,p)  and  35Cl(n,α)  cross  sections  from  activation  were  compared  against  CoH3.  These  allow  verification  of  the  inelastic  channel  strength  obtained  from  the  γ-ray  data  as  well  as  determining  the  total  35Cl(n,α)  channel  strength  which  was  not  available  from  the  other  methods.Our  results  identify  a  ∼50%  reduction  in  the  magnitude  of  the  35Cl(n,  p0)  35S  cross  section  compared  to  the  ENDF/B-VIII.0  evaluation.  This  result  is  consistent  with  a  2020  measurement  by  Kuvin  et.  al.  Comparison  of  the  γ-ray  production  data  to  CoH3  model  calculations  suggest  that  the  elastic  and/or  inelastic  channels  must  increase  to  compensate  for  the  reduction  observed  in  the  (n,  p0)  channel.
■590    ▼aSchool  code:  0028.
■650  4▼aNuclear  engineering
■650  4▼aNuclear  physics
■650  4▼aEnergy
■650  4▼aInorganic  chemistry
■650  4▼aNuclear  chemistry
■650  4▼aComputational  physics
■653    ▼aMolten  Chloride  Fast  Reactors
■653    ▼aGamma-ray  data
■653    ▼aNeutron  induced  reactions  
■653    ▼aChlorine
■653    ▼aInelastic  channels
■690    ▼a0552
■690    ▼a0488
■690    ▼a0756
■690    ▼a0216
■690    ▼a0738
■690    ▼a0791
■71020▼aUniversity  of  California,  Berkeley▼bNuclear  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160466▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    Подробнее информация.

    • Бронирование
    • не существует
    • моя папка
    • Первый запрос зрения
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    материал
    Reg No. Количество платежных Местоположение статус Ленд информации
    TF10870 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * Бронирование доступны в заимствований книги. Чтобы сделать предварительный заказ, пожалуйста, нажмите кнопку бронирование

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.