摘要:

AbstractDeviations from normal mechanical properties observed in stainless steel irradiated by neutrons have been attributed to the production of helium in neutron reactions with nickel. A measurement of the thermal-neutron cross section for the59Ni(n,α)56Fe reaction has been made in which the alpha-particle emission was determined by a silicon surface-barrier particle spectrometer. The 2200 m/sec cross section obtained is 18.0±1.6 b. This value disagrees with 13.7±0.6 b reported earlier by Eiland and Kirouac.

ISSN:0029-5639    

DOI:10.13182/NSE75-A26626

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

摘要:

AbstractA new version of the source-multiplication method for measuring subcritical reactivities is presented. It does not require calibration against an independent reactivity measurement and can be applied for the determination of reactivities over the entire range of reactor shutdown. This version is compared with other source-multiplication methods.

ISSN:0029-5639    

DOI:10.13182/NSE75-A26627

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

摘要:

AbstractA new definition of reactivity, the source-multiplication reactivity, is presented. The physical meaning of the source-multiplication reactivity is discussed, and its relationship with the static and other definitions of reactivity is investigated. The definition of correction factors required for inferring different reactivities from source-multiplication measurements is also discussed.

ISSN:0029-5639    

DOI:10.13182/NSE75-A26628

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

摘要:

AbstractAn improvement made in a series representation of the J(θ,β) integral for Doppler broadening increases accuracy. The improvement consists of redefining theθparameter so that the approximate Doppler-broadened line shape agrees with the exact value at the line center.

ISSN:0029-5639    

DOI:10.13182/NSE75-A26629

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

摘要:

AbstractA generalized perturbation theory is derived, and a variational principle is presented, for the product of an arbitrary number of ratios of linear flux functionals and bilinear functionals in nuclear systems which are described by the homogeneous or the inhomogeneous Boltzmann equation.

ISSN:0029-5639    

DOI:10.13182/NSE75-A26630

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE75-A26631

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE75-A26632

出版商:Taylor&Francis    

年代:1975

数据来源: Taylor