Measurement of neutral mesons in + collisions at = 200 GeV and scaling properties of hadron production

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03

https://doi.org/10.1103/PhysRevD.83.052004

The PHENIX experiment at RHIC has measured the invariant differential cross section for production of , , and mesons in collisions at = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, and , determining the high and characterizing the low regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

Pulsed neutron experiments on FCA V-I

Nakamura, T.*; Nakano, M.*; Hiraoka, T.*

PNC TJ250 71-33T, 28 Pages, 1971/03

PNC-TJ250-71-33T.pdf:0.58MB

Pulsed neutron experiments have been performed on FCA V-1, the physics mockup core for the JOYO. Neutron decay curves have been measured at several different re-activities from the delayed critical down to -6 and the reactivity pindoller unit are determined for each decay curve. Both 's and 'ps show no dependence on detector positions or energy responses in the measured reactivity range (down to -2). and p hold good linear relation down to -6c is determined as 0.341 0.031x105 sec-1. c calculated by SNKPARAM with JAERI-FAST set is about 13%larger than the experimental value.