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wellerstein's profile
Alex Wellerstein
Alex Wellerstein
Alex Wellerstein
Verified account
@wellerstein

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Alex WellersteinVerified account

@wellerstein

Historian of science, secrecy, and nuclear weapons. Professor of STS at @FollowStevens. UC Berkeley alum with a Harvard PhD. NUKEMAP creator. Coder and web dev.

Hoboken, NJ / NYC
blog.nuclearsecrecy.com
Joined September 2011

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    Alex Wellerstein‏Verified account @wellerstein 14 Dec 2012
    • Report Tweet

    @russianforces Pavel, I've found references to the use of Tin-115 in RDS-6s. Do you have any clue why this particular isotope would be used?

    12:49 PM - 14 Dec 2012
    1 reply 0 retweets 0 likes
      1. New conversation
      1. Pavel Podvig‏ @russianforces 14 Dec 2012
        • Report Tweet
        Replying to @wellerstein

        @wellerstein Tin-115 was a codename for U-235 at some point.

        1 reply 0 retweets 0 likes
      2. Alex Wellerstein‏Verified account @wellerstein 14 Dec 2012
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        Replying to @russianforces

        @russianforces Ah! That would make more sense in context. Is "Ytterbium" code for plutonium?

        1 reply 0 retweets 0 likes
      3. Pavel Podvig‏ @russianforces 14 Dec 2012
        • Report Tweet
        Replying to @wellerstein

        @wellerstein There was a list somewhere. I don't remember Ytterbium though At the Tin-115 time plutonium was Te-120

        0 replies 0 retweets 0 likes
        4. End of conversation

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