24小时热门版块排行榜

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

wuli8

荣誉版主 (知名作家)

…………

1ST强帖: 2
应助: 35 (小学生)
贵宾: 12.924
金币: 20188.4
散金: 15888
红花: 88
沙发: 4
帖子: 7840
在线: 1114.6小时
虫号: 465889
注册: 2007-11-23
专业: 物理学I
管辖: 计算模拟

[交流] 【转帖】内聚能，结合能，电离能辨析已有7人参与

参考文献：

回复此楼

» 收录本帖的淘帖专辑推荐

第一性原理相关文档	研究生科研、学习	纳米及第一性原理方向	基本量化知识
学习	第一性原理计算-tg

» 猜你喜欢

职称评审没过，求安慰已经有49人回复
26申博自荐已经有3人回复
A期刊撤稿已经有4人回复
垃圾破二本职称评审标准已经有17人回复
投稿Elsevier的Neoplasia杂志，到最后选publishing options时页面空白，不能完成投稿已经有22人回复
EST投稿状态问题已经有7人回复
毕业后当辅导员了，天天各种学生超烦已经有4人回复
三无产品还有机会吗已经有6人回复

» 本主题相关价值贴推荐，对您同样有帮助:

…………

1楼 2010-10-25 20:14:01

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

zzy870720z

荣誉版主 (文坛精英)

1ST强帖: 3
应助: 47 (小学生)
贵宾: 9.05
金币: 30914.3
散金: 5613
红花: 68
沙发: 99
帖子: 12592
在线: 23567.6小时
虫号: 745488
注册: 2009-04-10
性别: GG
专业: 凝聚态物性I:结构、力学和
管辖: 分子模拟

★ ★ ★ ★ ★ ★
小木虫(金币+0.5):给个红包，谢谢回帖交流
ellsaking(金币+5): 谢谢补充，辛苦了 2011-02-15 17:35:41

Binding energy is the mechanical energy required to disassemble a whole into separate parts. A bound system typically has a lower potential energy than its constituent parts; this is what keeps the system together- often this means that energy is released upon the creation of a bound state. The usual convention is that this corresponds to a positive binding energy.

In general, binding energy represents the mechanical work which must be done against the forces which hold an object together, disassembling the object into component parts separated by sufficient distance that further separation requires negligible additional work.

At the atomic level the atomic binding energy of the atom derives from electromagnetic interaction and is the energy required to disassemble an atom into free electrons and a nucleus.

Electron binding energy is a measure of the energy required to free electrons from their atomic orbits. This is more commonly known as ionization energy.

At the nuclear level, binding energy is also equivalent to the energy liberated when a nucleus is created from other nucleons or nuclei[2][3]. This nuclear binding energy (binding energy of nucleons into a nuclide) is derived from the strong nuclear force and is the energy required to disassemble a nucleus into the same number of free unbound neutrons and protons it is composed of, so that the nucleons are far/distant enough from each other so that the strong nuclear force can no longer cause the particles to interact[4].

In astrophysics, gravitational binding energy of a celestial body is the energy required to expand the material to infinity. This quantity is not to be confused with the gravitational potential energy, which is the energy required to separate two bodies, such as a celestial body and a satellite, to infinite distance, keeping each intact (the latter energy is lower).

In bound systems, if the binding energy is removed from the system, it must be subtracted from the mass of the unbound system, simply because this energy has mass, and if subtracted from the system at the time it is bound, will result in removal of mass from the system[5]. System mass is not conserved in this process because the system is not closed during the binding process.

http://en.wikipedia.org/wiki/Binding_energy

大家可以对比一下，还是中文的好理解
电离能可以是电子结合能