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| 1.
論文 |
論文
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Takezawa, Sanzo
概要:
application/pdf<br />Departmental Bulletin Paper<br />The absorption bands of H_2, B"-X(4,0), D"-X(2,0) and 7pπ -X(1,0),
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observed around about 803 A, are investigated by using the high resolution spectrum with the reciprocal dispersion 0.6cm-1. This wavelength region is corresponding to the first ionization energy of H_2. Its spectrum are fairly complicate, because of overlapping or masking with many Rydberg bands, of which belong to high members of npσ -X and npπ -X. In this work, the previous line assignments of these bands are examined in detail and are partly modified under the assumption of the perturbation between 7pπ -X(v=1) and 5pπ D"(v=1) bands. The previously observed photoionization peak near the R(0) line of B"-X(4,0) band, 124 354.8cm^<-1> has been 2.7cm^<-1> less to be assigned as the Q(1) line of 7pπ -X(1,0); the J=1 level, 124 473.3cm^<-1>, is below the autoionizing level, 124 476.0cm^<-1> (H_a^+, v=0, J=1). In absorption the R(0) line of B"-X is just superimposed by the Q(1) line of 7pπ -X(1,0) band. This problem is interpreted by consideration of the rotational perturbation. For persuasive interpretation of this localized perturbation, the reliable energy levels and electronic potential curves are essential. The R-K-R potentials require the precise molecular constants for the construction. The rotational and vibrational constants of the three states are evaluated and discussed in this work.
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| 2.
論文 |
論文
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Takezawa, Sanzo
概要:
application/pdf<br />Departmental Bulletin Paper<br />The rotational lines of the 7pπ -X(1,0), 5pπ D"-X(2,0) and 4pσ B"-
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X(4,0) bands are reexamined; all these bands have been observed near its ionization threshhold at 803.7 A. The previously observed photoionization peak near the R(0) line of B"-X(4,0) band, 124 354.8cm^<-1> has been 2.7cm^<-1> less to be assigned as the Q(1) line of 7pπ -X(1,0); the J=1 level, 124 473.3cm^<-1>, is below the autoionizing level, 124 476.0cm^<-1> (H_2^+, v=0, J=1). This problem is interpreted without contradiction in terms of an accidental preionization, namely by interaction with the autoionized levels of D"(v=2). The accidental preionization analogzes to accidental predissociation. Also, it is noticed that the perturbation is preferable to assert the anormalous quantum defects of the Q (1) lines in 7pπ -X(1,0). The present caluculation under the assumption of the perturbation suggests the autoinization rate of the 7pπ state having the similar order to that of the 5pπ D" state.
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