JAEA
  • help
  • PC | SP
  • JP | EN
          
検索対象：     
報告書番号：
※ 半角英数字
 年 ～ 
 年
全てクリア
検索結果：　3 件中 1件目～3件目を表示
  • 1

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

発表言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

選択した検索結果をダウンロード

論文

On the use of neutron tomography for morphological analysis of highly corroded Kofun-period iron weapon fragments supported by quantitative neutron diffraction analysis and X-ray-based techniques

Cantini, F.*; Ryan, J.*; Guidorzi, L.*; Magalini, M.*; Sans-Planell, O.*; Giudice, A. L.*; Garagiola, C.*; Re, A.*; Diana, E.*; 篠原 武尚*; et al.

Archaeological and Anthropological Sciences, 18(1), p.9_1 - 9_18, 2026/01

https://doi.org/10.1007/s12520-025-02378-1
 被引用回数：1 パーセンタイル：66.53(Anthropology)

Iron artifacts from Japan's Kofun period (mid-3rd to early 7th century AD) are often recovered as heavily mineralized fragments, making it difficult to identify their original morphology and composition. Since archaeometallurgical studies require statistical analysis of many artifacts, non-destructive methods are essential. In this study, neutron tomography was applied to heavily mineralized iron sword fragments from Kofun-period tombs in Okayama Prefecture, Japan. The technique successfully visualized contrasts between iron-rich corrosion products and surrounding non-metal regions, enabling morphological analysis even when little metallic iron remained. Combined with neutron diffraction and X-ray techniques, the method provided new archaeometallurgical insights in a completely non-invasive manner.

論文

Observation of $$Upsilon(4S)to eta' Upsilon(1S)$$

Guido, E.*; 谷田 聖; Belle Collaboration*; 他168名*

Physical Review Letters, 121(6), p.062001_1 - 062001_7, 2018/08

AA2018-0596.pdf:0.37MB

https://doi.org/10.1103/PhysRevLett.121.062001
 被引用回数：11 パーセンタイル：55.85(Physics, Multidisciplinary)

We report the first observation of the hadronic transition $$Upsilon(4S)toeta'Upsilon(1S)$$, using 496 fb$$^{-1}$$ data collected at the $$Upsilon(4S)$$ resonance with the Belle detector at the KEKB asymmetric-energy $$e^{+}e^{-}$$ collider. We reconstruct the $$eta'$$ meson through its decays to $$rho^0gamma$$ and to $$pi^+pi^-eta$$, with $$etatogammagamma$$. We measure: $${cal B}(Upsilon(4S)toeta'Upsilon(1S))=(3.43pm 0.88 {rm(stat.)} pm 0.21 {rm(syst.)})times10^{-5}$$, with a significance of 5.7$$sigma$$.

論文

Study of $$eta$$ and dipion transitions in $$Upsilon(4S)$$ decays to lower bottomonia

Guido, E.*; 谷田 聖; Belle Collaboration*; 他180名*

Physical Review D, 96(5), p.052005_1 - 052005_11, 2017/09

AA2017-0515.pdf:0.99MB

https://doi.org/10.1103/PhysRevD.96.052005
 被引用回数：19 パーセンタイル：60.18(Astronomy & Astrophysics)

We study hadronic transitions between bottomonium states using 496 fb$$^{-1}$$ data collected at the $$Upsilon(4S)$$ resonance with the Belle detector at the KEKB asymmetric energy $$e^+e^-$$ collider. We measure $$B(Upsilon(4S) to pi^+ pi^-Upsilon(1S)) = (8.2 pm 0.5 ({rm stat}) pm 0.4({rm syst})) times 10^{-5}$$, $$B(Upsilon(4S) to pi^+ pi^-Upsilon(2S)) = (7.9 pm 1.0 ({rm stat}) pm 0.4({rm syst})) times 10^{-5}$$, and $$B(Upsilon(4S) to eta Upsilon(1S)) = (1.70 pm 0.23 ({rm stat}) pm 0.08({rm syst})) times 10^{-4}$$. We measure the ratio of branching fractions $$R=B(Upsilon(4S) to eta Upsilon(1S))/B(Upsilon(4S) to pi^+ pi^-Upsilon(1S))=2.07 pm 0.30 ({rm stat}) pm 0.11({rm syst})$$. We search for the decay $$Upsilon(1^3D_{1,2}) to eta Upsilon(1S)$$, but do not find significant evidence for such a transition. We also measure the initial-state radiation production cross sections of the $$Upsilon(2S, 3S)$$ resonances and we find values compatible with the expected ones. Finally, the analysis of the $$Upsilon(4S) to pi^+ pi^-Upsilon(1S)$$ events shows indications for a resonant contribution due to the $$f_0(980)$$ meson.

3 件中 1件目～3件目を表示
  • 1