Performance of neutron polarimeter SMART-NPOL Noji, S.; Miki, K.; Yako, K. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2007, Letnik:
578, Številka:
1
Journal Article
Recenzirano
The neutron polarimeter SMART-NPOL has been constructed at the RIKEN Accelerator Research Facility for measuring polarization correlations of proton–neutron systems. The SMART-NPOL system consists of ...12 parallel neutron counter planes of two dimensionally position-sensitive plastic scintillators with a size of
60
×
60
×
3.0
cm
3
. Polarimetry measurements were made using the analyzing power of the
H
1
(
n
⇒
,
n
)
H
1
reaction occurring in the plastic scintillators. The effective analyzing power of SMART-NPOL was measured with polarized neutrons from the zero-degree
Li
6
(
d
⇒
,
n
⇒
)
reaction with an incident deuteron energy of
135
MeV
/
A
. The effective analyzing power thus obtained was
0.26
±
0
.
01
stat
±
0
.
03
syst
and the double scattering efficiency was
1.1
×
10
-
3
.
Type II binomial distribution of order k was introduced by Ling (1988). In this article the probability function, the probability generating function and asymptotic properties of the distribution are ...discussed. Some properties of the corresponding negative binomial distribution of order k, which was introduced by Ling (1989) are also examined.
The double-differential cross sections for the 48Ca(p,n) and 48Ti(n,p) reactions were measured at 300 MeV. A multipole decomposition technique was applied to the spectra to extract the Gamow-Teller ...(GT) components. The integrated GT strengths up to an excitation energy of 30 MeV in 48Sc are 15.3+/-2.2 and 2.8+/-0.3 in the (p,n) and (n,p) spectra, respectively. In the (n,p) spectra additional GT strengths were found above 8 MeV where shell models within the fp shell-model space predict almost no GT strengths, suggesting that the present shell-model description of the nuclear matrix element of the two-neutrino double-beta decay is incomplete.
Reference priors for prediction Kuboki, Hisataka
Journal of statistical planning and inference,
06/1998, Letnik:
69, Številka:
2
Journal Article
Recenzirano
This article discusses the reference decision method for developing noninformative priors for prediction analyses. An information-theoretic criterion is advocated for choosing priors. Reference ...priors for prediction are defined to be priors which maximize the criterion in some asymptotic sense. These priors satisfy Jeffreys' original requirement of invariance under reparametrization. In the regular case, an explicit form of reference priors for prediction is given. Typically, it reduces to the Jeffreys prior. However, an example is given to illustrate how it produces a different prior than the ordinary noninformative priors.
Lactobacillus casei I-5 isolated from an alcohol fermentation broth enhanced immunity and prevented pathogenic infection as a probiotic. Mice fed with I-5 cells for 11 days prior to an ...intraperitoneal challenge with pathogenic Escherichia coli Juhl exhibited a high survival rate compared with the control group. Rats fed with I-5 cells for 10 days significantly increased the phagocytosis of peritoneal macrophages. In a cell culture system employing peritoneal macrophages from rats, the I-5 administration activated NF- kappaB stimulated by LPS. It also enhanced LPS-stimulated IL-12 and TNF-alpha production, but not IL-6 production. These results show that L. casei I-5 effectively prevented infection by pathogenic E. coli possibly through the activation of peritoneal macrophages. The strain would be useful to prevent pathogenic microbial infections in humans and farm animals.
