排序方式: 共有23条查询结果,搜索用时 31 毫秒
1.
Atiya MS Chiang I Frank JS Haggerty JS Ito MM Kycia TF Li KK Littenberg LS Stevens A Strand RC Louis WC Akerib DS Marlow DR Meyers PD Selen MA Shoemaker FC Smith AJ Azuelos G Blackmore EW Bryman DA Felawka L Kitching P Kuno Y Macdonald JA Numao T Padley P Poutissou J Poutissou R Roy J 《Physical review letters》1990,65(1):21-24
2.
Atiya MS Chiang IH Frank JS Haggerty JS Ito MM Kycia TF Li KK Littenberg LS Sambamurti A Stevens A Strand RC Louis WC Akerib DS Marlow DR Meyers PD Selen MA Shoemaker FC Smith AJ Blackmore EW Bryman DA Felawka L Kitching P Konaka A Kuno Y Macdonald JA Numao T Padley P Poutissou JM Poutissou R Roy J Soluk R Turcot AS 《Physical review letters》1993,70(17):2521-2524
3.
A. Van Der Schaaf E.A. Hermes R.J. Powers F.W. Schlepütz R.G. Winter A. Zglinski T. Kozlowski W. Bertl L. Felawka W.H.A. Hesselink J. Van Der Pluym 《Nuclear Physics A》1983,408(3):573-589
Neutron-gamma coincidence spectra have been measured for muon capture in 16O. The γ-spectrum is dominated by the ground state transitions from the states of 15N that are populated after the emission of one neutron. The neutron energy spectra and the neutron energy dependence of the ny angular correlation coefficient A2 for these final states are presented. The observed transitions in 14N and the associated neutron spectra give direct evidence for the emission of two correlated neutrons. The data are discussed in terms of direct neutron emission plus emission via giant resonance intermediate states of 16N. The large yield for the emission of one and two fast neutrons is explained by a capture mechanism involving short-range nucleon-nucleon correlations. 相似文献
4.
J. Gr?ter P.A. Amaudruz R. Bilger P. Camerini J. Clark H. Clement E. Friedman L. Felawka S.N. Filippov E. Friagiacomo Y.K. Gavrilov E. Gibson N. Grion G.J. Hofman B. Jamieson T.L. Karavicheva M. KermaniPresent address: Sonigistix Corporation Richmond B.C. Canada VA-E--> E.L. Mathie R. Meier G. Moloney D. Ottewell J. P?tzold O. Patarakin K. Raywood R. Rui M. Schepkin M.E. Sevior G.R. Smith H. Staudenmaier R. Tacik G. Tagliente G.J. Wagner M. Yeomans 《The European Physical Journal A - Hadrons and Nuclei》1999,4(1):5-7
A search for the production of a bound trineutron state has been performed using the reaction 3He(π−,π+)nnn at incident pion energies of 65, 75, and 120 MeV. No evidence for the existence of the 3n was found, and an upper limit for the production cross section of approximately 30 nb/sr (2σ confidence level) was obtained.
Received: 22 October 1998 相似文献
5.
6.
7.
Atiya MS Chiang IH Frank JS Haggerty JS Ito MM Kycia TF Li KK Littenberg LS Stevens A Strand RC Louis WC Akerib DS Hildreth M Marlow DR Meyers PD Selen MA Shoemaker FC Smith AJ Azuelos G Blackmore EW Bryman DA Felawka L Kitching P Kuno Y Macdonald JA Numao T Padley P Poutissou JM Poutissou R Roy J 《Physical review letters》1989,63(20):2177-2180
8.
9.
Adler S Atiya MS Chiang IH Frank JS Haggerty JS Kycia TF Li KK Littenberg LS Sambamurti A Stevens A Strand RC Witzig C Louis WC Akerib DS Ardebili M Convery MR Ito MM Marlow DR McPherson RA Meyers PD Selen MA Shoemaker FC Smith AJ Blackmore EW Bryman DA Felawka L Kitching P Konaka A Kujala VA Kuno Y Macdonald JA Nakano T Numao T Padley P Poutissou JM Poutissou R Roy J Soluk R Turcot AS 《Physical review letters》1996,76(9):1421-1424
10.
Airapetian A Akopov N Akopov Z Amarian M Andrus A Aschenauer EC Augustyniak W Avakian R Avetissian A Avetissian E Bacchetta A Bailey P Balin D Beckmann M Belostotski S Bianchi N Blok HP Böttcher H Borissov A Borysenko A Bouwhuis M Brüll A Bryzgalov V Capitani GP Cappiluppi M Chen T Ciullo G Contalbrigo M Dalpiaz PF Leo RD Demey M Nardo LD Sanctis ED Devitsin E Nezza PD Düren M Ehrenfried M Elalaoui-Moulay A Elbakian G Ellinghaus F Elschenbroich U Fabbri R Fantoni A Fechtchenko A Felawka L 《Physical review letters》2005,94(1):012002
Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion (phi) and the target spin axis (phi(S)) about the virtual-photon direction and relative to the lepton scattering plane. The extracted Fourier component sin((phi+phi(S))(pi)(UT) is a signal of the previously unmeasured quark transversity distribution, in conjunction with the Collins fragmentation function, also unknown. The component sin((phi-phi(S)(pi)(UT) arises from a correlation between the transverse polarization of the target nucleon and the intrinsic transverse momentum of quarks, as represented by the previously unmeasured Sivers distribution function. Evidence for both signals is observed, but the Sivers asymmetry may be affected by exclusive vector meson production. 相似文献