Resonance effect in inner-shell nd → 1s two-photon decay

Znanstveni rad - Izvorni znanstveni rad

• Autor: Ksenofont Ilakovac
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Emission of photon pairs by the two-photon decay process from silver and hafnium atoms with a vacancy in the K shell was investigated. Radioactive decay of 109^Cd and 179^Ta was used to generate the K-shell vacancy states in silver and hafnium atoms, respectively. The measuring system consisted of a pair of planar high-purity germanium detectors, a fast-slow coincidence system, and a 128x512x512 channel pulse-height analyzer. Two-dimensional spectra of numbers of events as functions of amplitudes of coincident pulses from the two detectors were analyzed. The results on the 3d -> 1s two-photon decay show the resonance behaviour, seen as a gradual increase of the differential transition probability as the partition of energy among the two photons of the pair deviates from equal-energy partition (E_1=E_2=E0/2). The effect was predicted by the second-order perturbation theory of two-photon decay in which summation over intermediate states is carried out over occupied and unoccupied bound states, and over unbound states.

• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Fizika B
• Brojčani podaci: vol. 1, br. 1, str. 71-82
• p-ISSN: 1330-0016
• URN:NBN: urn:nbn:hr:217:734558
• Datum objave publikacije: 1992
• URL dokumenta: http://fizika.hfd.hr/fizika_b/bv92/b1p071.htm
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2019-10-02 15:16:17