NL100: Turn top pair should I shove river?

[XST]

Villain has only just sat down at the table so I have no read. Not really worried about the jack pairing because I don't think he would call a double barrel with second pair. Should I just shove river?

PokerStars No-Limit Hold'em, $1.00 BB (4 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($66.90)
Hero ($150.05)
Button ($61.40)
SB ($91.45)

Preflop: Hero is UTG with 9[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $4</font>, Button calls $4, <font color="#666666">2 folds</font>.

Flop: ($9.50) 2[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $6</font>, Button calls $6.

Turn: ($21.50) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $15</font>, Button calls $15.

River: ($51.50) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero...