<p><b>碳-11</b>或<sup>11</sup>C是碳的人造放射性同位素之一，原子核包含了6個質子和5個中子，原子核自旋是-3/2，它會透過正電子發射衰變成硼-11，半衰期是20.38 分鐘。它有 0.19–0.23% 的機率是以電子捕獲衰變的。</p>
<dl><dd><span><span>11<br></span>C<span><br></span></span> → <span><span>11<br></span>B<span><br></span></span> + <span><span><br></span>e<span>+<br></span></span>
 + <span><span><br></span>ν<span><br>e</span></span>
 + <span>0.9605 MeV</span></dd>
<dd><span><span>11<br></span>C<span><br></span></span> + <span><span><br></span>e<span>−<br></span></span>
 → <span><span>11<br></span>B<span><br></span></span> + <span><span><br></span>ν<span><br>e</span></span> + <span>1.9825 MeV</span></dd></dl><p>它可以由氮-14被質子轟擊而成：
</p>
<dl><dd><span><span>14<br></span>N<span><br></span></span> + <span><span><br></span>p<span><br></span></span>
 → <span><span>11<br></span>C<span><br></span></span> + <span><span>4<br></span>He<span><br></span></span></dd></dl><p>碳-11 可以用作正電子斷層掃描的放射性同位素。碳-11的載體包括 <span data-orig-title="3-氨基-4-(2-二甲胺基甲基苯基硫)-苯甲腈" data-lang-code="en" data-lang-name="英語" data-foreign-title="DASB"><span>[<span><span>11<br></span>C<span><br></span></span>]DASB</span></span> 和 <span data-orig-title="2-(4-碘-2,5-双甲氧基苯基)-N-((2-甲氧苯基)甲基)乙胺" data-lang-code="en" data-lang-name="英語" data-foreign-title="25I-NBOMe"><span>[<span><span>11<br></span>C<span><br></span></span>]Cimbi-5</span></span>。
</p>
<h2><span id=".E5.8F.83.E8.A6.8B"></span><span id="參見">參見</span></h2>
<ul><li>碳-14</li>
<li>碳-13</li>
<li>碳-12</li>
<li>碳的同位素</li></ul><h2><span id=".E5.8F.82.E8.80.83.E8.B5.84.E6.96.99"></span><span id="参考资料">參考資料</span></h2>

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**碳 - 11** 或 11C 是碳的人造放射性同位素之一，原子核包含了 6 個質子和 5 個中子，原子核自旋是 - 3/2，它會透過正電子發射衰變成硼 - 11，半衰期是 20.38 分鐘。它有 0.19–0.23% 的機率是以電子捕獲衰變的。

　
: 11 
C 
  → 11 
B 
  + 
e+ 

 + 
ν 
e
 + 0.9605 MeV

　
: 11 
C 
  + 
e− 

 → 11 
B 
  + 
ν 
e + 1.9825 MeV

它可以由氮 - 14 被質子轟擊而成：

　
: 14 
N 
  + 
p 

 → 11 
C 
  + 4 
He

碳 - 11 可以用作正電子斷層掃描的放射性同位素。碳 - 11 的載體包括 [11 
C 
]DASB 和 [11 
C 
]Cimbi-5。

## 參見

* 碳 - 14
* 碳 - 13
* 碳 - 12
* 碳的同位素

## 參考資料
14333-33-6