کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8182987 | 1527080 | 2015 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mass spectrometric searches for superheavy elements in terrestrial matter
ترجمه فارسی عنوان
جستجوی جرم طیف سنجی برای عناصر فوق سنگین در ماده زمینی
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کلمات کلیدی
عناصر فوق سنگین محدودیت فراوانی طبیعی، طیف سنج جرمی شتاب دهنده،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
Recent searches for traces of long-lived superheavy elements (SHEs) in terrestrial materials by mass spectrometric means are reviewed. Positive evidence for long-lived neutron-deficient Th isotopes in Th and Rg isotopes in Au, and a possible A=292, Zâ¼122 nuclide in Th was reported from experiments with Inductively Coupled Plasma Sector Field Mass Spectrometry (ICP-SF-MS). These findings were not confirmed with Accelerator Mass Spectrometry (AMS), with abundance limits lower by several orders of magnitude. In addition, the extensive AMS searches for 42 SHE nuclides (A=288-310) around the much discussed “island of stability” (Z=114, N=184) in natural Pt, Au, Pb, Bi materials are reviewed. Due to the flatness of the mass distribution and the relatively large bandwidth of the mass acceptance in AMS searches, an effectively much larger number of SHE nuclides was scanned in the respective materials. No positive evidence for the existence of long-lived SHEs (t1/2>108Â yr) with abundance limits of 10â12 to 10â16 was found.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 944, December 2015, Pages 190-203
Journal: Nuclear Physics A - Volume 944, December 2015, Pages 190-203
نویسندگان
Gunther Korschinek, Walter Kutschera,