Optimization of the LLNL/CAMS gas-accepting ion source and 1 MV compact AMS for natural abundance radiocarbon analysis of CO2 [0.03%]
LLNL/CAMS气体接受离子源的优化及用于自然丰度二氧化碳放射性碳分析的紧凑型1MV加速器质谱仪
Taylor A B Broek,Kimber C Moreland,Ted J Ognibene et al.
Taylor A B Broek et al.
The Lawrence Livermore National Laboratory - Center for Accelerator Mass Spectrometry (LLNL/CAMS) 1 MV AMS system was converted from a biomedical AMS instrument to a natural abundance 14C spectrometer. The system is equipped with a gas-acce...
Conversion of the LLNL/CAMS 1 MV biological AMS system to a semi-automated natural abundance 14C spectrometer: system optimization and performance evaluation [0.03%]
LLNL/CAMS 1MV生物AMS系统转换为半自动自然丰度14C光谱仪的系统优化和性能评估
Taylor A B Broek,Ted J Ognibene,Karis J McFarlane et al.
Taylor A B Broek et al.
The Lawrence Livermore National Laboratory - Center for Accelerator Mass Spectrometry compact 1 MV biomedical accelerator mass spectrometer was repurposed and optimized for the semi-automated radiocarbon measurement of natural abundance env...
Production and separation of positron emitters for hadron therapy at FRS-Cave M [0.03%]
用于强子治疗的FRS-CAVE M正电子发射器的产生与分离
E Haettner,H Geissel,B Franczak et al.
E Haettner et al.
The FRagment Separator FRS at GSI is a versatile spectrometer and separator for experiments with relativistic in-flight separated short-lived exotic beams. One branch of the FRS is connected to the target hall where the bio-medical cave (Ca...
Isotopic production cross sections in proton-16O and proton-12C interactions for energies from 10 MeV/u to 100 GeV/u [0.03%]
质子-16O和质子-12C相互作用中从10MeV/u到100GeV/u的能量产生的同位素产生截面
Francis A Cucinotta,Sungmin Pak
Francis A Cucinotta
Proton interactions with 16O or 12C nuclei are frequent nuclear interaction leading to secondary radiation in tissues for space radiation and cancer therapy with protons or ion beams. The fragmentation of these ions by protons produces a la...
Study of Total, Absorption, and 3He and 3H Production Cross Sections in 4He-proton Collisions [0.03%]
4He-质子碰撞的总截面、吸收截面和3He、3H产生截面的研究
Congchong Yan,Premkumar B Saganti,Francis A Cucinotta
Congchong Yan
Light ion breakup cross sections are important for studies of cosmic ray interactions in the inter-stellar medium or radiation protection considerations of energy deposition in shielding and tissues. Abrasion cross sections for heavy ion re...
John W Norbury,Nikolai Sobolevsky,Charles M Werneth
John W Norbury
A program of comparing American (NASA) and Russian (ROSCOSMOS) space radiation transport codes has recently begun, and the first paper directly comparing the NASA and ROSCOSMOS space radiation transport codes, HZETRN and SHIELD respectively...
Synchrotron Radiation as a Tool for Macromolecular X-Ray Crystallography: a XXI Century Perspective [0.03%]
同步辐射在大分子X射晶学中的应用——21世纪的视角
Marek Grabowski,David R Cooper,Dariusz Brzezinski et al.
Marek Grabowski et al.
Intense X-rays available at powerful synchrotron beamlines provide macromolecular crystallographers with an incomparable tool for investigating biological phenomena on an atomic scale. The resulting insights into the mechanism's underlying ...
Microstructure of atmospheric particles revealed by TXM and a new mode of influenza virus transmission [0.03%]
透射X射线显微镜揭示大气颗粒微观结构及流感病毒传播的新方式
L M Bao,G L Zhang,Q T Lei et al.
L M Bao et al.
For control of influenza, firstly it is important to find the real virus transmission media. Atmospheric aerosol particles are presumably one of the media. In this study, three typical atmospheric inhaled particles in Shanghai were studied ...
Infrared and visible laser spectroscopy for highly-charged Ni-like ions [0.03%]
高电荷镍_like离子的红外和可见激光光谱学研究
Yuri Ralchenko
Yuri Ralchenko
Application of visible or infrared (IR) lasers for spectroscopy of highly-charged ions (HCI) has not been particularly extensive so far due to a mismatch in typical energies. We show here that the energy difference between the two lowest le...
Trials and Tribulations in the First Three Years in Operation of the SSAMS for Biomedical 14C-AMS at LLNL [0.03%]
劳伦斯利弗莫尔国家实验室生物医学14C-AMS同位素比质谱（SSAMS）头三年的运行经验教训
T J Ognibene,K W Haack,G Bench et al.
T J Ognibene et al.
We report on the first several years of operation of our recently installed 250 kV SSAMS at LLNL, purchased to replace our 1-MV AMS system for the measurement of 14C from labeled biochemical samples. We have modified the ion source region t...