IMPROVING THE VALIDITY OF MOSSBAUER HYPERFINE PARAMETER DISTRIBUTIONS - THE MAXIMUM-ENTROPY FORMALISM AND ITS APPLICATIONS

被引：37

作者：

BRAND, RA ^{[1
]}

LECAER, G ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, INST FESTKORPERFORSCH, D-5170 JULICH 1, FED REP GER

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1988年 / 34卷 / 02期

关键词：

SPECTRUM ANALYSIS;

D O I：

10.1016/0168-583X(88)90754-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The maximum entropy principle from information theory is applied to the problem of determining hyperfine distributions from Mossbauer spectra. The method is compared to the usual matrix method and it is shown that the smoothing parameter of the latter can be avoided. The method is applied to several simulated spectra calculated from model distributions, and to an experimental spectrum showing a spin density wave (or Overhauser) distribution. It is shown that the maximum entropy method can lead to a more model-independent determination of the distribution. It is especially useful in cases where the hyperfine distribution contains a sharp maximum.

引用

页码：272 / 284

页数：13

共 24 条

[1] ALGORITHM FOR FINDING THE DISTRIBUTION OF MAXIMAL ENTROPY [J].

AGMON, N ;

ALHASSID, Y ;

LEVINE, RD .

JOURNAL OF COMPUTATIONAL PHYSICS, 1979, 30 (02) :250-258

[2]

[Anonymous], 1986, NUMERICAL RECIPES

[3] IMPROVING THE VALIDITY OF HYPERFINE FIELD DISTRIBUTIONS FROM MAGNETIC-ALLOYS .1. UNPOLARIZED SOURCE [J].

BRAND, RA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1987, 28 (03) :398-416

[4] IMPROVING THE VALIDITY OF HYPERFINE FIELD DISTRIBUTIONS FROM MAGNETIC-ALLOYS .2. POLARIZED SOURCE AND SPIN TEXTURE [J].

BRAND, RA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1987, 28 (03) :417-432

[5] INFORMATION-THEORY AND THE SPECTRUM OF ISOTROPIC TURBULENCE [J].

BROWN, TM .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1982, 15 (07) :2285-2306

[6]

CRAMER H, 1961, ELEMENTS PROBABILITY

[7] PERCOLATION CALCULATIONS AND A MOSSBAUER STUDY OF IRON PLATINUM ALLOYS WITH THE FEPT3 STRUCTURE [J].

DANIELS, JM ;

JULIAN, SR ;

LAM, HY ;

LI, PL .

CANADIAN JOURNAL OF PHYSICS, 1985, 63 (03) :409-416

[8] 1ST MOSSBAUER-EFFECT EVIDENCE OF THE 3RD HARMONIC OF SPIN-DENSITY-WAVES IN METALLIC CHROMIUM [J].

DUBIEL, SM ;

LECAER, G .

EUROPHYSICS LETTERS, 1987, 4 (04) :487-491

[9] A THEOREM FOR PHYSICISTS IN THE THEORY OF RANDOM-VARIABLES [J].

GILLESPIE, DT .

AMERICAN JOURNAL OF PHYSICS, 1983, 51 (06) :520-533

[10] IMAGE-RECONSTRUCTION FROM INCOMPLETE AND NOISY DATA [J].

GULL, SF ;

DANIELL, GJ .

NATURE, 1978, 272 (5655) :686-690

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