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Chang, S. K.; Cheney, M. C.

doi:10.1103/physrevc.6.1898

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…The measured half-life of 44(1) min agrees with the currently adopted value of 36.8(3) min. We credit Abou-Leila with the discovery because he identified the first excited state of the daughter nucleus ( 172 Hf) correctly and the somewhat longer half-life was later explained by a possible contamination [30]. The result by Butement and Briscoe [31] mentioned in the quote was not considered correct by neither Abou-Leila nor later by Chang and Cheney [29,30].…”

Section: Tamentioning

confidence: 89%

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Discovery of tantalum, rhenium, osmium, and iridium isotopes

Robinson

Thoennessen

2012

Atomic Data and Nuclear Data Tables

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Currently, thirty-eight tantalum, thirty-eight rhenium, thirty-nine osmium, and thirty-eight iridium, isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.The discovery of tantalum, rhenium, osmium, and iridium isotopes is discussed as part of the series summarizing the discovery of isotopes, beginning with the cerium isotopes in 2009 [1]. Guidelines for assigning credit for discovery are (1) clear identification, either through decay-curves and relationships to other known isotopes, particle or γ-ray spectra, or unique mass and Z-identification, and (2) publication of the discovery in a refereed journal. The authors and year of the first publication, the laboratory where the isotopes were produced as well as the production and identification methods are discussed. When appropriate, references to conference proceedings, internal reports, and theses are included. When a discovery includes a half-life measurement the measured value is compared to the currently adopted value taken from the NUBASE evaluation [2] which is based on the ENSDF database [3]. In cases where the reported half-life differed significantly from the adopted half-life (up to approximately a factor of two), we searched the subsequent literature for indications that the measurement was erroneous. If that was not the case we credited the authors with the discovery in spite of the inaccurate half-life. All reported half-lives inconsistent with the presently adopted half-life for the ground state were compared to isomers half-lives and accepted as discoveries if appropriate following the criterium described above.Good examples why publications in conference proceedings should not be considered are 118 Tc and 120 Ru which had been reported as being discovered in a conference proceeding [4] but not in the subsequent refereed publication [5]. The initial literature search was performed using the databases ENSDF [3] and NSR [6] of the National Nuclear Data Center at Brookhaven National Laboratory. These databases are complete and reliable back to the early 1960's. For earlier references, several editions of the Table of Isotopes were used [7-12]. A good reference for the discovery of the stable isotopes was the second edition of Aston's book "Mass Spectra and Isotopes" [13].

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Section: Tamentioning

confidence: 89%

“…Residues were separated using the velocity filter SHIP. For 163 Os no half-life was measured and only an α-decay energy of 6510(30) keV was listed in a table. "The lightest isotope, 168 Pt, could be identified by 4 correlated events to the daughter 164 Os.…”

mentioning

confidence: 99%

Discovery of tantalum, rhenium, osmium, and iridium isotopes

Robinson

Thoennessen

2012

Atomic Data and Nuclear Data Tables

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“…Certainly, the smallness of the sites and the large numbers of campsites scattered along the streams indicate a pattern of continuing movement. The archaeological and ethnohistorical data combined suggest that these peoples were 11 restricted wanderers 11 , operating within an owned territory (Ruecking 1953;Nunley 1971;Chang 1972). When finances permit further and more detailed analysis of the faunal materials, especially of the ages of the various animals represented, we might obtain important clues as to the times of the year during which the Tortugas Creek sites were inhabited.…”

Section: Sum}fary and Discussionmentioning

confidence: 99%

Some Aspects of Late Prehistoric and Protohistoric Archaeology in Southern Texas

Hester¹,

Hill²

1975

ITA

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“…The settlement system approach has emerged as an important methodological tool in archaeological research and it is widely employed to investigate the human interrelationship with their environment (Bettinger 1980;Binford 1972Binford , 1980Chang 1968Chang , 1972Jochim 1976;Paddayya 1982;Trigger 1978;Wiley 1953). Various constraints, such as the lack of a chronological resolution at most of the sites, absence of data for reconstructing the palaeoenvironment, the limited scope of the present study, and other factors preclude a complete analysis of the settlement system of Mesolithic hunter-gatherers.…”

Section: Settlement System Of the Mesolithic Hunter-gatherersmentioning

confidence: 99%

Hunter-Gatherer Adaptations in Madurai Region, Tamil Nadu, India: From c. 10,000 B.P. to c. A.D. 500

Selvakumar¹

2002

asi

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Archaeological investigations undertaken in the upper Gundar Basin (Madurai district, Tamil Nadu, India) between 1991 and 1996 have yielded evidence for the Mesolithic and Iron Age–Early Historic periods. The research has revealed that microlith-using hunter-gatherers continued to exist during the Iron Age and Early Historic periods, and interacted with agropastoral groups. This paper discusses the settlement system of Mesolithic hunter-gatherers and interactions between the hunter-gatherers and the agropastoral groups of the Iron Age–Early Historic period.

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Half-Lives ofTa171andTa

Cited by 5 publications

References 2 publications

Discovery of tantalum, rhenium, osmium, and iridium isotopes

Discovery of tantalum, rhenium, osmium, and iridium isotopes

Some Aspects of Late Prehistoric and Protohistoric Archaeology in Southern Texas

Hunter-Gatherer Adaptations in Madurai Region, Tamil Nadu, India: From c. 10,000 B.P. to c. A.D. 500

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