Method for the definitive detection of orbital angular momentum states in neutrons by spin-polarized 3He [0.03%]
利用自旋极化$ ^{3} He$检测中子轨道角动量态的确证方法
Terrence Jach,John Vinson
Terrence Jach
A standard method to detect thermal neutrons is the nuclear interaction 3He(n,p)3H. The spin dependence of this interaction is also the basis of a neutron spin-polarization filter using nuclear polarized 3He. We consider the corresponding i...
Experimental upper bound and theoretical expectations for parity-violating neutron spin rotation in 4He [0.03%]
检验四方氦中宇称非守恒的中子自旋进动的实验上限和理论预期值
H E Swanson,B R Heckel,C D Bass et al.
H E Swanson et al.
Neutron spin rotation is expected from quark-quark weak interactions in the standard model, which induce weak interactions among nucleons that violate parity. We present the results from an experiment searching for the effect of parity viol...
Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N [0.03%]
与宇宙射线天文物理相关的核素生成截面的现状和期望精度：Li、Be、B、C 和N元素
Yoann Génolini,David Maurin,Igor V Moskalenko et al.
Yoann Génolini et al.
The precision of the current generation of cosmic-ray (CR) experiments, such as AMS-02, PAMELA, CALET, and ISS-CREAM, is now reaching ≈1-3% in a wide range in energy per nucleon from GeV/nucleon to multi-TeV/nucleon. Their correct interpre...
Half-life of 51Mn [0.03%]
mn-51的半衰期
Stephen A Graves,Paul A Ellison,Hector F Valdovinos et al.
Stephen A Graves et al.
The half-life of 51Mn was measured by serial gamma spectrometry of the 511-keV annihilation photon following decay by β + emission. Data were collected every 100 seconds for 100,000-230,000 seconds within each measurement (n = 4). The 511-...
A B Balantekin,H R Band,C D Bass et al.
A B Balantekin et al.
Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources of ν ¯ e is important when ma...
Direct observation of spin rotation in Bragg scattering due to the spin-orbit interaction in silicon [0.03%]
硅中自旋轨道相互作用的布拉格散射实验观测到了自旋进动现象
T R Gentile,M G Huber,D D Koetke et al.
T R Gentile et al.
As a neutron scatters from a target nucleus, there is a small but measurable effect caused by the interaction of the neutron's magnetic dipole moment with that of the partially screened electric field of the nucleus. This spin-orbit interac...
M Yuly,T Eckert,G Hartshaw et al.
M Yuly et al.
The 12C(n, 2n)11C cross section was measured from just below threshold to 26.5 MeV using the Pelletron accelerator at Ohio University. Monoenergetic neutrons, produced via the 3H(d,n)4He reaction, were allowed to strike targets of polyethyl...
New evidence for chemical fractionation of radioactive xenon precursors in fission chains [0.03%]
裂变链中放射性氙前体化学分馏的新证据
A P Meshik,O V Pravdivtseva,C M Hohenberg
A P Meshik
Mass-spectrometric analyses of Xe released from acid-treated U ore reveal that apparent Xe fission yields significantly deviate from the normal values. The anomalous Xe structure is attributed to chemically fractionated fission (CFF), previ...