Skip to main content

203Tl(n, γ) reaction and level structure of204Tl

Реакция203T1(n, γ) и структура уровней204Tl


The low-lying level structure of 20481 Tl has been studied by means of the thermal-neutron capture reaction on203Tl. The γ-ray spectrum from this reaction was studied below 1.8 MeV with a Ge(Li) spectrometer. Owing to the great complexity of the decay scheme γ-γ coincidence measurements using two Ge(Li) detectors were made. Spin and parity assignments for some of the lowest-lying levels are proposed. The level energy values are 140.6, 300.0, 318.4, 432.3 471.6, 488.2, 535.9, 628.3, 736.7, 1013.6, 1051.9, 1250.7, 1474.3 and 1741.1 keV. The agreement of the present results with a recent calculation of the low-energy spectra of odd-odd thallium isotopes seems satisfactory, at least for what concerns the first excited levels.


Lo schema dei livelli del204Tl è stato studiato mediante la reazione203Tl(n, γ). Lo spettro γ è stato analizzato mediante un rivelatore al Ge(Li) fino ad un’energia di 1.8 MeV. Data la grande complessità dello schema di decadimento, è stata effettuata una misura di coincidenze γ-γ mediante due rivelatori al Ge(Li). Si suggeriscono spin e parità per alcuni livelli di bassa energia. Le energie dei livelli sono 140.6, 300.0, 318.4, 432.3, 471.6, 488.2, 535.9, 628.3, 736.7, 1013.6, 1051.9, 1250.7, 1474.3 e 1741.1. L’accordo fra i risultati di questo lavoro e quelli di un recente calcolo teorico sembra soddisfacente almeno per quanto riguarda i primi livelli.


Была исследована структура ниэколежаших уровней 20481 4Т1, испольэуя реакцию эахвата тепловых нейтронов на203T1. Иэучается спектр гамма-лучей иэ зтой реакции ниже 1.8 МзВ, испольэуя Сге(Li) спектрометр. Вследствие больщой сложности схемы распада проведены иэмерения γ-γ совпадений, испольэуя Gе(Li) детектора. Для некоторых ниэколежаших уровней предлагается эадание спина и четности. Знауения уровней знергии следуюшие: 140.6, 300.0, 318.4, 432.3, 471.6, 488.2, 535.9, 628.3, 736.7, 1013.6, 1051.9, 1250.7, 1474.3 и 1741.1 кзВ. Согласие полу-ченных реэультатов с недавним вычислением спектров при ниэких знергиях для нечетно-нечетных иэотопов таллия, по-видимому, удовлетворительное, по крайней мере, в отнощении первых воэбужденных уровней.

This is a preview of subscription content, access via your institution.


  1. A. Fubini, N. Lo. Iudice, D. Prosperi andE. Salusti:Nuovo Cimento,68 A, 502 (1970).

    Article  MATH  ADS  Google Scholar 

  2. A. Fubini, F. Terrasi andI. Vata:Lett. Nuovo Cimento,19, 992 (1971).

    Article  Google Scholar 

  3. A. Fubini, M. Giannini, E. Ivanov, M. Popa, D. Prosperi andV. Rado:Neutron Capture Gamma-Ray Spectroscopy (Studsvik, 11–15 August 1969), p. 317.

  4. C. Weitkamp, J. A. Harvey, G. G. Slaughter andE. C. Campbell:Neutron Capture Gamma-Ray Spectroscopy (Studsvik, 11–15 August 1969), p. 421;C. Weitkamp: private communication.

  5. M. Giannini, P. R. Oliva andM. C. Ramorino: RT/FI(72)14.

  6. A. Fubini, M. Popa, D. Prosperi andF. Terrasi:Nuovo Cimento,2 A, 109 (1971).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Additional information

To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Fubini, A., Alberini, R. & Lattanzi, D. 203Tl(n, γ) reaction and level structure of204Tl. Nuov Cim A 18, 711–725 (1973).

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: