Gamma-radiation of136Cs

Frána, J.; Rezanka, I.; Špalek, A.; Maštalka, A.

doi:10.1007/bf01698029

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…The two new levels seen in this work are those at 2356.6 and 2373.7 keV. For discussions of the other levels, we refer thy reader to previous works on this nucleus [2][3][4][5][6][7]. The 2374-keV level decays by four gamma rays rays with a total intensity of 0.21, which gives a log-ft value of 8.0 for beta decay to this level.…”

Section: Experimental Results and Decay Schemementioning

confidence: 95%

“…They include decay scheme studies of 136La E5, 6], neutron capture gamma-ray studies [8,12], and reaction spectroscopy studies [7]. Except for our initial report [3], no new data have been added on the decay of 136Cs since Reising and Pate [2], except for the note of Frana et al [4]. The gamma-ray spectrum detected from the decay of 136Cs cannot be improved over that given by these authors using ordinary singles gamma-ray spectroscopy.…”

Section: Discussionmentioning

confidence: 97%

“…The decay of 136Cs was last studied by Reising and Pate [2] using magnetic electron spectrometry, NaIscintillation spectrometry, and 7-~ coincidence spectrometry. Other than our initial report [3] the only work is that of Frana et al [4]. They detected three weak gamma transitions'not seen in the NaI work of Reising and Pate and could only assign two of these transitions as connecting known levels in ~36Ba.…”

Section: Introductionmentioning

confidence: 89%

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Two quasi-particle levels in136Ba and the decay of136Cs

1975

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Section: Experimental Results and Decay Schemementioning

confidence: 95%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 89%

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Two quasi-particle levels in136Ba and the decay of136Cs

1975

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“…Out of chemical elements, those which survive metallurgical processes are most suitable as they can still carry information on the origin of the material (Pernicka 2014, 252-255). Classification of the elemental combinations into material groups form the basis for provenance studies; this way thousands of data has been obtained in Europe (Pernicka 2014;Radivojević et al 2019;Frána et al 1995;. The assessment of lead isotopic ratios complements the classification of material groups using the chemical composition analyses.…”

Section: Evaluation Of Continuity Of Specialised Production and Organisation Of Long-distance Contactsmentioning

confidence: 99%

Central Sites and the Development of Rural Settlements from the Middle to Late La Tène Period in Central Moravia

Čižmář¹,

Danielisová²

2021

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At a certain point in time, there were two central places in central Moravia: an older unfortified central agglomeration near the present-day village of Němčice nad Hanou and a younger oppidum at Staré Hradisko. Each of this centres had its own approach to raw materials, orientation of the socio-economic contacts, and possibly political focus as well. Němčice, being located at one of the main branches of the Amber Road, connected the Middle Danube area from the Mediterranean to the Adriatic; Staré Hradisko eventually expanded these contacts into a systematic trade network, being under the strong influence of the Bohemian region with links to Bavaria. During the LT C2, in addition to the location of the central place, changes took place in terms of material culture and settlement strategies in the region. This was further accentuated in LT D1 by the shift of settlements towards the west, to the vicinity of the oppidum and, at the same time, vacation of the corridor around the Morava River. In an attempt to chronologically assess the settlement pattern, it became evident how important it is to define, as precisely as possible, the dating of individual sites. This was only possible thanks to the detailed and extensive study of the material available (Čižmář 2018). Thanks to precise dating of settlements and classification based on the new chronology, the seemingly illogical group of settlements in central Moravia revealed a distinct settlement network which, in particular during the period contemporary with the oppidum, allows us to see the significant changes in the number of sites and in the orientation of long-distance contacts that were possibly associated with historical events.

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Levels and transitions in136Ba

et al. 1973

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Excited states of 136Ba are studied in the beta decay of 136Cs. The gamma spectrum is measured with high-resolution and coincidence techniques. Several new transitions are suggested to be connected with two recently reported levels. Gamma-gamma directional correlations are performed in an attempt to determine the characteristics of these levels, and in order to determine mixing ratios. The lifetime of the 2207.5 keV state is remeasured, and the lifetime of the 2140.5 keV state is measured for the first time.The level scheme of larBa has been investigated in the beta decay of 136Cs [1][2][3][4][5][6][7][8] and electron capture of la6La [10,11], and in neutron capture [12][13][14][15] and inelastic scattering [16]. The nucleus la6Ba may be regarded as transitional in the sense that the low-lying excitations have been described in terms of a quasi-rotational band [17], and as phonon states [11]. The first excited states, with I~=2 +, 2 +, 0 +, and 4 +, occur at 818.6, 1551.1, 1579.0, and 1866.5 keV, respectively. In an energy region just above the 4 + level many states appear. These states are partly deexcited by highly retarded E1 transitions. In the shell-model picture they are interpreted as two-particle (hole) configurations. A further clarification of the level scheme of this transitional nucleus should be important for elucidating the interaction between the quasi-particles, and the nature of the collective excitations.The decay of ~36Cs has been studied in this work. Due to the spin of the parent, I~= 5 +, preferentially states of fairly high spins are populated in this decay.The 136Cs activity was produced in a (d, e) reaction by irradiating enriched (99.8~) laSBa, as nitrate, with 25 MeV deutrons at IKO, Amsterdam. A 36 cm 3 Ge (Li) detector was employed in the measurements of the gamma spectrum. Several measurements were performed during 5 half-lives of the source, in order to show that all transitions are charactensed by the decay constant of ~ 3 6Cs. The result of the intensity measurements is presented in Table 1, together with the data by Fr~ina et al. [8].The Ge (Li) detector was used in coincidence with a NaI (T1) detector in order to testify that the new transitions belong to ~a6Ba, and in order to place them in the level scheme. The six weak transitions found in this 1 Z. Physik, Bd. 260

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Gamma-radiation of136Cs

Cited by 7 publications

References 2 publications

Two quasi-particle levels in136Ba and the decay of136Cs

Two quasi-particle levels in136Ba and the decay of136Cs

Central Sites and the Development of Rural Settlements from the Middle to Late La Tène Period in Central Moravia

Levels and transitions in136Ba

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