A SIMS METHOD FOR BE-10/BE-9 RATIO MEASUREMENT IN ENVIRONMENTAL MATERIALS

被引:24
作者
BELSHAW, NS
O'NIONS, RK
VON BLANCKENBURG, F
机构
[1] Department of Earth Sciences, Cambridge University, Cambridge, Downing Street
关键词
BERYLLIUM; COSMOGENIC; ISOLAB-120; ISOTOPES; SIMS;
D O I
10.1016/0168-1176(94)04125-Q
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
A new SIMS based technique for measurement of Be-10/Be-9 ratios in a variety of environmental materials is reported. Be samples are chemically preconcentrated and isotopically analysed using a VG ISOLAB-120 SIMS instrument by sputtering Be from a Ta target using a primary beam of 0(+) ions. Potential interferences (BeH+)-Be-9 and B-10(+) on Be-10 are reduced to negligible or manageable proportions by the use of the instrument's mass resolving power and abundance sensitivity, and sputtering Be+ at approximate to 1000 degrees C under which condition the total contribution from (BeH+)-Be-9 and B-10(+) is reduced to < 1 c.p.s. The repeatability of measurement has been assessed using Oak Ridge National Laboratory (ORNL) dilutions with Be-10/Be-9 ratios between 10(-2) and 10(-9) and instrumental mass discrimination evaluated using boron reference material, NIST SRM-951. The mass discrimination is estimated to be 4 +/- 1% u(-1) at mass 10 and the repeatability of Be-10/Be-9 ratio measurement is 4% (one standard deviation).
引用
收藏
页码:55 / 67
页数:13
相关论文
共 15 条
  • [1] [Anonymous], 1967, KOSMISCHE STRAHLUNG, DOI [DOI 10.1007/978-3-642-46079-1_7, 10.1007/978-3-642-46079-1_7]
  • [2] HIGH-RESOLUTION SIMS ANALYSIS OF COMMON LEAD
    BELSHAW, NS
    ONIONS, RK
    MARTEL, DJ
    BURTON, KW
    [J]. CHEMICAL GEOLOGY, 1994, 112 (1-2) : 57 - 70
  • [3] Benninghoven A., 1987, SECONDARY ION MASS S, V86
  • [4] DETERMINATION OF BORON AND LITHIUM IN NUCLEAR-MATERIALS BY SECONDARY ION MASS-SPECTROMETRY
    CHRISTIE, WH
    EBY, RE
    WARMACK, RJ
    LANDAU, L
    [J]. ANALYTICAL CHEMISTRY, 1981, 53 (01) : 13 - 17
  • [5] HIGH-PRECISION URANIUM, THORIUM AND RADIUM ISOTOPE RATIO MEASUREMENTS BY HIGH DYNAMIC-RANGE THERMAL IONIZATION MASS-SPECTROMETRY
    COHEN, AS
    BELSHAW, NS
    ONIONS, RK
    [J]. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 1992, 116 (01) : 71 - 81
  • [6] Deloule E., 1991, GEOCHEMICAL SOC SPEC, V3, P53
  • [7] BE-10 - HALF-LIFE AND AMS-STANDARDS
    HOFMANN, HJ
    BEER, J
    BONANI, G
    VONGUNTEN, HR
    RAMAN, S
    SUTER, M
    WALKER, RL
    WOLFLI, W
    ZIMMERMANN, D
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1987, 29 (1-2) : 32 - 36
  • [8] DEVELOPMENT OF THE NBS BE-10/BE-9 ISOTOPIC STANDARD REFERENCE MATERIAL
    INN, KGW
    RAMAN, S
    COURSEY, BM
    FASSETT, JD
    WALKER, RL
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1987, 29 (1-2) : 27 - 31
  • [9] BORON ISOTOPE SYSTEMATICS OF MARINE-SEDIMENTS
    ISHIKAWA, T
    NAKAMURA, E
    [J]. EARTH AND PLANETARY SCIENCE LETTERS, 1993, 117 (3-4) : 567 - 580
  • [10] ON BE-10 STANDARDS AND THE HALF-LIFE OF BE-10
    MIDDLETON, R
    BROWN, L
    DEZFOULYARJOMANDY, B
    KLEIN, J
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1993, 82 (03) : 399 - 403