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Photoelectron spectroscopy of As-, As-2(-), As-3(-), As-4(-), and As-5(-)

机译:As-,As-2(-),As-3(-),As-4(-)和As-5(-)的光电子能谱

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The negative ion photoelectron spectra of As-,-As-2, As-3(-), As-4(-), and As-5(-) have been measured. From these, the electron affinities of As, As-2, As-3, As-4, and As-5 have been determined to be 0.814, 0.739, 1.45, <0.8, and similar to 1.7 eV, respectively. In the case of As-2(-), the following molecular constants were also determined: r(e)(As-2(-))= 2.239 Angstrom, omega(e)(As-2(-)) = 293 cm(-1), omega(e)chi(e)(As-2(-)) = 4.9 cm(-1), D-0(As-2(-)) = 3.89 eV, and Delta E[(2)Pi(g)(3/2)-(2)Pi(g)(1/2)] = 0.256 eV. In the case of As-3(-), vertical detachment energy (VDE) was measured to be 1.62 eV, and for As-3, Delta E((2)A(2)-B-2(1)) was determined to be 0.36 eV. For As-4(-), VDE was found to be 1.52 eV. The relatively high stability of As; suggests that it, like Pg,may be a candidate for forming cluster-assembled, ionic crystals of stoichiometry, MAs5, where M is an alkali metal atom. Similiarities with other small cluster anions of Group V elements are also discussed. (C) 1998 American Institute of Physics. [S0021-9606(98)00748-X]. [References: 56]
机译:已经测量了As-,-As-2,As-3(-),As-4(-)和As-5(-)的负离子光电子光谱。根据这些,已确定As,As-2,As-3,As-4和As-5的电子亲和力分别为0.814、0.739、1.45,<0.8,并且类似于1.7 eV。对于As-2(-),还确定了以下分子常数:r(e)(As-2(-))= 2.239埃,ω(e)(As-2(-))= 293 cm (-1),omega(e)chi(e)(As-2(-))= 4.9 cm(-1),D-0(As-2(-))= 3.89 eV和Delta E [(2 )Pi(g)(3/2)-(2)Pi(g)(1/2)] = 0.256 eV。在As-3(-)的情况下,垂直分离能(VDE)测量为1.62 eV,对于As-3,确定了Delta E((2)A(2)-B-2(1))。为0.36 eV。对于As-4(-),发现VDE为1.52 eV。砷的相对较高的稳定性;这表明它与Pg一样,可能是形成化学计量的簇组装离子晶体MAs5的候选者,其中M是碱金属原子。还讨论了与第V组元素的其他小簇阴离子的相似性。 (C)1998美国物理研究所。 [S0021-9606(98)00748-X]。 [参考:56]

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