Ichikawa's wiki

**以前のリビジョンの文書です** ----

Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/inc/parser/handler.php on line 1458

Warning: Declaration of syntax_plugin_math::handle($match, $state, $pos, &$handler) should be compatible with DokuWiki_Syntax_Plugin::handle($match, $state, $pos, Doku_Handler $handler) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/math/syntax.php on line 105

Warning: Declaration of syntax_plugin_math::render($mode, &$renderer, $data) should be compatible with DokuWiki_Syntax_Plugin::render($format, Doku_Renderer $renderer, $data) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/math/syntax.php on line 129

Warning: Declaration of syntax_plugin_indexmenu_tag::handle($match, $state, $pos, &$handler) should be compatible with DokuWiki_Syntax_Plugin::handle($match, $state, $pos, Doku_Handler $handler) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/indexmenu/syntax/tag.php on line 43

Warning: Declaration of syntax_plugin_indexmenu_tag::render($mode, &$renderer, $data) should be compatible with DokuWiki_Syntax_Plugin::render($format, Doku_Renderer $renderer, $data) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/indexmenu/syntax/tag.php on line 51

Warning: Declaration of syntax_plugin_indexmenu_indexmenu::handle($match, $state, $pos, &$handler) should be compatible with DokuWiki_Syntax_Plugin::handle($match, $state, $pos, Doku_Handler $handler) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/indexmenu/syntax/indexmenu.php on line 58

Warning: Declaration of syntax_plugin_indexmenu_indexmenu::render($mode, &$renderer, $data) should be compatible with DokuWiki_Syntax_Plugin::render($format, Doku_Renderer $renderer, $data) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/indexmenu/syntax/indexmenu.php on line 209

Warning: Declaration of syntax_plugin_jsmath::handle($match, $state, $pos, &$handler) should be compatible with DokuWiki_Syntax_Plugin::handle($match, $state, $pos, Doku_Handler $handler) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/jsmath/syntax.php on line 90

Warning: Declaration of syntax_plugin_jsmath::render($mode, &$renderer, $data) should be compatible with DokuWiki_Syntax_Plugin::render($format, Doku_Renderer $renderer, $data) in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/lib/plugins/jsmath/syntax.php on line 130

Warning: preg_match(): Compilation failed: invalid range in character class at offset 4015 in /mnt/hep_web/hep_web/member/ichikawa/dokuwiki/inc/parser/lexer.php on line 118

====== 2011 ====== ===== 超重元素 渡辺君 ===== * 日本 Z=113,A=278 * Zn+Bi 断面積が小さい 300日で2個 * 分解能が必要 * ロシア Z=118 : まだ非公式（崩壊チェーンの途中に未知の過程) ===== CdTe検出器の厚さ→Siの純度 合田君 ===== * 空乏層の厚さ * 1mm厚 500Vくらい * $d = (2\epsilon \mu \rho V)^\frac{1}{2}$ * 耐電圧 1 MV/cmくらい * d~20cm (worst caseで6cm) * 比抵抗$\rho$を小さくしたい→純度を上げる * Siで考える * 99.9999999% (9N) (11Nもあるらしい) * Geも考える ===== 光速の精度 角谷君 ===== * 9桁 ===== 宇宙年齢 関君 ===== * 137.2億年±1.2億年　by WMAP * ハッブル定数 $H_0$=70.5±1.3 → 138.7億年 dark energyのせいでずれる * $\Omega_m$ 質量密度 $\Omega_\Lambda$ :宇宙定数で補正 ===== 原子時計の精度 長崎君 ===== * 今月の日経サイエンス