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Two-Photon Laser Spectroscopy of Autoionizing Rydberg Series of Atomic Tin
JIN Mingxing, DING Dajun, LIU Hang, PAN Shoufu
Chin. Phys. Lett. 1992, 9 (12):
643-646
.
Extensive new data on the even-parity autoionization Rydberg series of neutral-tin have been observed and identified by using two-photon resonant ionization laser spectroscopy and time-of-flight detection method. Observed autoionization Rydberg series are 5pnp(3/2,1/2)1,2, 5pnp(3/2,3/2)1,2,3, 5pnf3/2[5/2]2,3, 5pnp3/2[7/2]3,4, and 5pnf3/2[3/2]1,2. The second ionization limit I2 is obtained by fitting experimental data with the Rydberg formula. It is 63483.90±1.35cm-1.
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Flux Pinning in Y1-xMxBa2Cu3O7-δ(M=Gd, Eu and Sm) System
LI Jonghen*, FANG Minghu, HU Gangjin, ZHANG Xiaojun, JIAO Zhengkuan, ZHANG Qirui, ZHANG Yitong, JIN Xin, YAO Xixian
Chin. Phys. Lett. 1992, 9 (12):
667-669
.
In this paper, the flux pinning effects in Y1-xMxBa2Cu3O7-δ(M=Gd, Eu and Sm) samples are reported. It is found that there is another pinning mechanism under higher magnetic fields in addition to that under lower fields. This pinning effect may stem from the lattice stress field resulting from the partial substitution of the rare earth elements with different atomic radii for Y.
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14 articles
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