An investigation of the reaction negative K��p ��� K������� at P_(lab) = 2 Gev/c

<p>The reaction K^-p���K^-��⁺n has been studied for incident kaon momenta of 2.0 GeV/c. A sample of 19,881 events was obtained by a measurement of film taken as part of the K-63 experiment in the Berkeley 72 inch bubble chamber. </p> <p>Based upon our analysis, we have reached four conclusions. (1) The magnitude of the extrapolated K�� cross section differs by a factor of 2 from the P-wave unitarity prediction and the K⁺n results; this is probably due to absorptive effects. (2) Fits to the moments yield precise values for the K�� S-wave which agree with other recent statistically accurate experiments. (3) An anomalous peak is present in our backward K^-p���(��+n) K^- u-distribution. (4) We find a non-linear enhancement due to interference similiar to the one found by Bland et al. (Bland 1966).</p>

Part I: Total yield measurements for the ^(21)Ne(��,n)^)(24)Mg reaction. Part II: A study of the ^(12)C(He,p)^(14)N reaction

<p>PART I</p> <p>The total cross-section for the reaction ²¹Ne(��, n)²⁴Mg has been measured in the energy range 1.49 Mev ��� E_cm ��� 2.6 Mev. The cross-section factor, S(O), for this reaction has been determined, by means of an optical model calculation, to be in the range 1.52 x 10¹² mb-Mev to 2.67 x 10¹² mb-Mev, for interaction radii in the range 5.0 fm to 6.6 fm. With S(O) ��� 2 x 10¹² mb-Mev, the reaction ²¹Ne(��, n)²⁴Mg can produce a large enough neutron flux to be a significant astrophysical source of neutrons.</p> <p>PART II</p> <p>The reaction¹²C(³He, p)¹⁴N has been studied over the energy range 12 Mev ��� E_lab ��� 18 Mev. Angular distributions of the proton groups leading to the lowest seven levels in ¹⁴N were obtained.</p> <p>Distorted wave calculations, based on two-nucleon transfer theory, were performed, and were found to be reliable for obtaining the value of the orbital angular momentum transferred. The present work shows that such calculations do not yield unambiguous values for the spectroscopic factors.</p>

Inelastic K+p reactions at incident momenta from 1.37 GeV/c to 2.17 GeV/c

<p>A number of recent experiments have suggested the possibility of a highly inelastic resonance in K⁺p scattering. To study the inelastic K⁺p reactions, a 400 K exposure has been taken at the L.R.L. 25 inch bubble chamber. The data are spread over seven K⁺ momenta between 1.37 and 2.17 GeV/c.</p> <p>Cross-sections have been measured for the reaction K⁺p ��� pK����+ which is dominated by the quasi-two body channels K��� and K*N. Both these channels are strongly peripheral, as at other momenta. The decay of the ��� is in good agreement with the predictions of the rho-photon analogy of Stodolsky and Sakurai. The data on the K*p channel show evidence of both pseudo scalar and vector exchange.</p> <p>Cross-sections for the final state pK⁺��+��- shows a strong contribution from the quasi-two body channel K*���. This reaction is also very peripheral even at threshold. The decay angular distributions indicate the reaction is dominated as at higher momenta by a pion exchange mechanism. The data are also in good agreement with the quark model predictions of Bialas and Zalewski for the K* and ��� decay.</p>